БЛОК МОДЕЛИ УХА, ИСКУССТВЕННАЯ ГОЛОВА И ИЗМЕРИТЕЛЬНОЕ УСТРОЙСТВО И СПОСОБ, ИСПОЛЬЗУЮЩИЕ УПОМЯНУТЫЕ БЛОК МОДЕЛИ УХА И ИСКУССТВЕННУЮ ГОЛОВУ

Изобретение относится к виброакустической метрологии. Измерительное устройство содержит средство генерирования вибрации, удерживаемое на голове манекена. Голова манекена снабжена искусственным ухом, имитирующим человеческое ухо. Устройство также содержит детектор вибраций, расположенный в ухе, и микрофон. Устройство также снабжено искусственной барабанной перепонкой с размещенными в ней датчиками. Манекен также имеет искусственный наружный слуховой проход, при этом модель человеческого уха выполнена из материала, такого как резина. Материал, используемый для модели уха, удовлетворяет требованиям IEC 60318-7 или IEC 60268-7, или представляет собой материал, обладающий твердостью по Шору от 30 до 60. Модель уха также имеет ушную раковину. Устройство излучения вибраций и звука удерживается в ушной раковине или в отверстии слухового прохода. Наружный слуховой проход имеет длину от 5 мм до 40 мм. Искусственное ухо выполнено с возможностью прикрепляться или сниматься с головы манекена. Крепление ...

СЕЙСМИЧЕСКИЙ ДАТЧИК

Изобретение относится к области геофизики и может быть использовано в процессе проведения сейсмической съемки. Описано устройство для сейсмической съемки, содержащее корпус, ускоряемую массу, по меньшей мере один датчик, выполненный с возможностью обнаружения перемещения ускоряемой массы относительно корпуса, электронную схему, соединенную с упомянутым по меньшей мере одним датчиком и выполненную с возможностью получения и обработки выходного сигнала этого датчика, и источник питания, выполненный с возможностью подачи электрической энергии в электронную схему и представляющий собой составную часть ускоряемой массы. Причем датчик, выполненный с возможностью обнаружения перемещения ускоряемой массы относительно корпуса, содержит один или более пьезоэлектрических элементов. Технический результат – повышение чувствительности устройства. 19 з.п. ф-лы, 6 ил.

СИСТЕМА КОНТРОЛЯ ВИБРАЦИИ И ТЕМПЕРАТУРЫ С БЕСПРОВОДНЫМИ ДАТЧИКАМИ И УЗЕЛ КРЕПЛЕНИЯ ПЬЕЗОКЕРАМИЧЕСКОГО ЭЛЕМЕНТА В БЕСПРОВОДНОМ ДАТЧИКЕ

... (57) Заявленная группа изобретений относится к области измерительной техники. Система характеризуется наличием базовой станции и беспроводных датчиков, выполненных с возможностью обмена информацией по радиоканалам в цифровом формате благодаря использованию уникальных серийных номеров, выполненных без возможности изменения. Каждый датчик снабжен элементом питания, а базовая станция выполнена с возможностью связи с компьютером интерфейсом RS-485 и поддерживает протокол обмена данными Modbus RTU; питание базовой станции производится по двухпроводному интерфейсу; питание датчика обеспечивается индивидуальным элементом питания; датчик выполнен с возможностью установки на объекты контроля и установлен в изолирующий бокс. Узел крепления пьезокерамического элемента в беспроводном датчике, характеризующийся тем, что он содержит основание датчика, в основании выполнено шесть крепежных отверстий с резьбой; на основании датчика расположен слой слюды; на слое слюды расположен слой медной фольги; на ...

РОБОТ С СОЧЛЕНЕННОЙ РУКОЙ И СПОСОБ ОБРАБОТКИ РЕЗАНИЕМ ЗАГОТОВКИ ПОСРЕДСТВОМ РОБОТА С СОЧЛЕНЕННОЙ РУКОЙ

Изобретение относится к роботу (1) с сочлененной рукой и способу обработки заготовки посредством робота (1) с сочлененной рукой. Робот (1) с сочлененной рукой содержит основание (2), приемный элемент (7) для рабочей головки, рычажные плечи (3), которые расположены между основанием (2) и приемным элементом (7) для рабочей головки и соединены друг с другом посредством вращающихся шарниров (4), рабочую головку (8), которая расположена на приемном элементе (7) для рабочей головки. Причем рабочая головка (8) включает в себя расположенный в корпусе (13) ходового винта рабочий ходовой винт (9), который установлен в корпусе (13) ходового винта по меньшей мере в одном первом месте опоры (14) и одном втором месте (15) опоры. В первом месте (14) опоры и во втором месте (15) опоры выполнено по меньшей мере по одному сенсору (16) для регистрации радиальной силы (17). По меньшей мере в одном из двух мест (14, 15) опоры выполнен по меньшей мере один сенсор (18) для регистрации осевой силы (19). Изобретение ...

Трехосевой вибропреобразователь

Изобретение относится к метрологии. Трехосевой вибропреобразователь содержит пьезочувствительный трехосевой датчик, оси которого соединены с соответствующими зарядовыми усилителями. Датчик выполнен с возможностью компенсации влияния поперечных осей. К выходам каждого зарядового усилителя подключены по два последовательно соединенных умножителя, вторые входы которых соединены с выходами нормализаторов, входы которых подключены к выходам зарядовых усилителей поперечных осей. Коэффициенты передач нормализаторов настраиваются при градуировке вибропреобразователя исходя из условия компенсации вибрационных нагрузок поперечных осей. Для этого измеряют напряжение на выходе зарядового усилителя, например, оси не только при воздействием вибрационной нагрузки на эту ось, но и напряжение и на выходе этой оси при воздействии этой же вибрационной нагрузки на поперечные оси, что позволяет установить необходимые коэффициенты передач соответствующих нормализаторов, где присутствуют напряжение на выходе ...

СПОСОБ ИСПЫТАНИЙ ЭЛЕКТРООБОРУДОВАНИЯ АВТОТРАНСПОРТНЫХ СРЕДСТВ НА ВОСПРИИМЧИВОСТЬ К ЭЛЕКТРОМАГНИТНОМУ ПОЛЮ

Изобретение относится к электрическим испытаниям транспортных средств. В способе испытаний электрооборудования автотранспортных средств на восприимчивость к внешнему электромагнитному полю испытываемое электрооборудование устанавливают в бортовую сеть транспортного средства и подвергают воздействию внешнего излучения с заданными параметрами. На каждой частоте воздействующего излучения транспортное средство позиционируется в горизонтальной плоскости по отношению к внешнему источнику электромагнитного поля в диапазоне определенных углов. Во время испытаний угловая скорость вращения транспортного средства относительно внешнего источника излучения не должна превышать 5 град/с. При этом минимальное расстояние между внешним источником излучения и транспортным средством выбирается исходя из максимального линейного размера транспортного средства в горизонтальной плоскости и угла главного лепестка диаграммы направленности в горизонтальной плоскости внешнего источника излучения. Повышается полнота ...

ГИБКИЙ ДАТЧИК ВИБРАЦИИ НА ОСНОВЕ PVDF СТРУКТУРЫ

Полезная модель относится к области измерений механических вибраций и может быть использована при разработке контрольно-измерительной аппаратуры для оценки состояния человека в режиме реального времени, а также в автомобильной электронике, строительстве, ж/д и авиационной технике, геологии, электроэнергетике, нефтегазовой сфере. Гибкий датчик вибрации на основе PVDF структуры представляет собой тонкий диск, состоящий из прямоугольных полимерных пьезоэлектрических чувствительных элементов из слоя поливинилиденфторида (PVDF) или его сополимеров, электродов и токоведущих дорожек с двух сторон чувствительных элементов, двух тонких гибких защитных подложек из слюды с лицевой и обратной стороны, контактных площадок на периферии лицевой стороны, слоя бензоциклобутена (ВСВ) или полимеров на его основе, заполняющего пространство между чувствительными элементами. Диаметр датчика и количество чувствительных элементов определяется характером контролируемой поверхности и требованиями к разрешающей способности ...

ПАССИВНЫЙ БЕСПРОВОДНЫЙ ДАТЧИК МАГНИТНОГО ПОЛЯ НА ПОВЕРХНОСТНЫХ АКУСТИЧЕСКИХ ВОЛНАХ

Изобретение относится к пассивным пьезоэлектрическим датчикам. Датчик магнитной индукции содержит герметичный корпус, внутри которого расположен пьезоэлектрический звукопровод, на рабочей поверхности которого в первом акустическом канале расположены приемопередающий встречно-штыревой преобразователь (ВШП), нагруженный на антенну через выводы в корпусе, которая расположена вне герметичного корпуса, отражательный ВШП и расположенный вне герметичного корпуса импеданс. На рабочей поверхности пьезоэлектрического звукопровода параллельно первому акустическому каналу, который является измерительным, введен второй – опорный акустический канал, где расположены еще один приемопередающий ВШП, соединенный через выводы в корпусе с другой антенной, и отражательный ВШП, причем импеданс через выводы в корпусе подсоединен к приемопередающему ВШП, находящемуся в измерительном акустическом канале, при этом расстояние между ВШП в параллельных измерительном и опорном акустических каналах отличаются на величину ...

БЛОК МОДЕЛИ УХА, ИСКУССТВЕННАЯ ГОЛОВА И ИЗМЕРИТЕЛЬНОЕ УСТРОЙСТВО И СПОСОБ, ИСПОЛЬЗУЮЩИЕ УПОМЯНУТЫЕ БЛОК МОДЕЛИ УХА И ИСКУССТВЕННУЮ ГОЛОВУ

... 1. Измерительное устройство для оценки акустического устройства, которое позволяет слышать звук посредством передачи вибрации благодаря корпусу, оборудованному вибрирующим элементом, удерживаемому на голове, имеющей человеческое ухо, при этом упомянутое измерительное устройство содержит:блок модели уха, воспроизводящий человеческое ухо;модель тела человека, которая удерживает акустическое устройство, идетектор вибраций, расположенный в блоке модели уха.2. Измерительное устройство по п. 1, при этомблок модели уха содержит модель уха и искусственный наружный слуховой проход, неразрывный с моделью уха, при этомискусственный наружный слуховой проход образован в блоке искусственного наружного слухового прохода.3. Измерительное устройство по п. 2, при этом искусственный наружный слуховой проход имеет длину от 5 мм до 40 мм.4. Измерительное устройство по п. 2 или 3, при этом блок модели уха включает в себя искусственную барабанную перепонку, неразрывную с блоком искусственного наружного слухового ...

ЦЕПЬ ОБРАТНОЙ СВЯЗИ ДЛЯ УСТОЙЧИВОГО К РАДИАЦИИ ДАТЧИКА

... 1. Датчик (10) для измерения вибрации, обеспечивающий компенсацию изменений выходного напряжения датчика, связанных с экспозицией радиации, содержащий акселерометр (12) для генерирования сигнала ускорения в соответствии с вибрацией, интегратор (14) для генерирования сигнала скорости путем интегрирования сигнала ускорения, поступающего с выхода акселерометра, содержащий усилитель (U1), цепь (R6, R7, C8) обратной связи по переменному току ("AC") для интегрирования сигналов ускорения, поступающих на вход усилителя, и цепь (D2, R5, R10, R4) обратной связи по постоянному току ("DC"), предназначенную для смещения усилителя, для формирования заданного выходного напряжения, причем цепь (D2, R5, R10, R4) обратной связи по постоянному току содержит резистор (R4) обратной связи, имеющий заданное значение, выбранное так, чтобы уменьшить на заданную величину изменение выходного напряжения усилителя (U1) при увеличении тока затвора, протекающего на вход усилителей (U1), в результате экспозиции усилителя ...

СИСТЕМА КОНТРОЛЯ ВИБРАЦИИ И ТЕМПЕРАТУРЫ С БЕСПРОВОДНЫМИ ДАТЧИКАМИ И УЗЕЛ КРЕПЛЕНИЯ ПЬЕЗОКЕРАМИЧЕСКОГО ЭЛЕМЕНТА В БЕСПРОВОДНОМ ДАТЧИКЕ

... 1. Система контроля вибрации и температуры с беспроводными датчиками, характеризующаяся наличием базовой станции, по крайней мере, одного беспроводного датчика, при этом базовая станция и беспроводные датчики выполнены с возможностью обмена информацией по радиоканалам в цифровом формате; каждый датчик и базовая станция имеют уникальные серийные номера; каждый датчик снабжен элементом питания.2. Система по п.1, отличающаяся тем, что серийный номер выполнен без возможности изменения.3. Система по п.1, отличающаяся тем, что серийный номер выполнен с возможностью передачи при обмене информацией.4. Система по п.1, отличающаяся тем, что базовая станция выполнена с возможностью связи с компьютером интерфейсом RS-485 и поддерживает протокол обмена данными Modbus RTU.5. Система по п.1, отличающаяся тем, что питание базовой станции производится по двухпроводному интерфейсу.6. Система по п.1, отличающаяся тем, что питание датчика обеспечивается индивидуальным элементом питания.7. Система по п.1, отличающаяся ...

Schwingungserfassungsvorrichtung

Vorrichtung zur Überwachung von Verunreinigungen in einem Gasstrom

Verfahren zur Körperschallmessung eines Bauteils und System zur Körperschallmessung eines Bauteils

Die Erfindung betrifft ein Verfahren zur Körperschallmessung eines Bauteils (30), dadurch gekennzeichnet, dass das Bauteil (30) ein Dünnschichtsystem (20) aufweist, wobei das Dünnschichtsystem (20) eine dehnungsempfindliche Widerstandsschicht (21) umfasst, wobei mithilfe des Dünnschichtsystems (20) eine Körperschallmessung für das Bauteil (30) durchgeführt wird.

Prüfanordnung zur Dehnungs- und Körperschallmessung eines Prüfkörpers

Sensoren zur Zustandsüberwachung von Maschinen und Prüfgegenständen sind weit verbreitet. Es wird eine Prüfanordnung 1 zur Prüfung eines Prüfkörpers 2 vorgeschlagen, mit einer Sensoreinrichtung 3 zur Bereitstellung von Sensordaten, wobei die Sensoreinrichtung 3 mindestens einen Sensor 5 zum Anbringen auf der Oberfläche 11 des Prüfkörpers 2 und zur Erzeugung von mindestens einem Sensorsignal umfasst, wobei der Sensor 5 zwei Elektroden 7a und 7b und ein Dielektrikum 8 aufweist und wobei das Dielektrikum 8 zwischen den zwei Elektroden 7a und 7b angeordnet ist, so dass der Sensor 5 einen Kondensator 9 mit einer Kapazität bildet, wobei das Sensorsignal abhängig von der Kapazität ist und mindestens einen Teil der Sensordaten bildet, und mit einer Auswerteinrichtung 4 zur Auswertung der Sensordaten, wobei die Auswerteeinrichtung 4 ausgebildet ist, auf Basis der Sensordaten eine Dehnung des Prüfkörpers 2 und eine Körperschwingung des Prüfkörpers 2 zu bestimmen.

Schwingungsaufnehmer

Ultraschallsensor

Ultraschallsensor (30; 50; 60), mit folgenden Merkmalen: einem Gehäusebauglied (31; 51) mit einem Hohlraum (33 ; 53) in demselben und einem einstückig mit dem Gehäusebauglied (31; 51) ausgebildeten Bodenabschnitt (32; 52), der an einem Ende des Hohlraums (33; 53) vorgesehen ist, wobei der Bodenabschnitt (32; 52) einen dicken Abschnitt (32a; 52a), der sich entlang einer ersten Richtung erstreckt, und ein Paar von dünnen Abschnitten (32b; 52b), die eine kleinere Dicke aufweisen als der dicke Abschnitt (32a; 52a) und die auf bezüglich des dicken Abschnitts (32a; 52a) gegenüberliegenden Seiten des Bodenabschnitts (32; 52) entlang einer zweiten Richtung, die sich von der ersten Richtung unterscheidet, vorgesehen sind, aufweist; und einem piezoelektrischen Element (35) zum Abstrahlen und/oder Erfassen von Ultraschall, wobei das piezoelektrische Element (35) in einem Zentrum des dicken Abschnitts (32a; 52a) auf einer inneren Oberfläche des Bodenabschnitts (32; 52) vorgesehen ist.

Verfahren zum Bestimmen einer Schwingung eines Mikrospiegelelements mittels einer Schallerfassungseinrichtung, elektronische Recheneinrichtung, Mikrospiegelanordnung sowie optoelektronischer Sensor

Die Erfindung betriff ein Verfahren zum Bestimmen einer mechanischen Schwingung (16) eines Mikrospiegelelements (13) einer Mikrospiegelanordnung (12) für einen optoelektronischen Sensor (5), bei welchem das Mikrospiegelelement (13) durch Anregung mit einem Anregungssignal (15) in die mechanische Schwingung (16) versetzt wird und die mechanische Schwingung (16) mittels einer Erfassungseinrichtung erfasst wird, wobei mittels einer als Schallerfassungseinrichtung (14) ausgebildeten Erfassungseinrichtung ein durch die mechanische Schwingung (16) erzeugtes Schallsignal (17) des Mikrospiegelelements (13) erfasst wird und mittels des erfassten Schallsignals (17) die Schwingung des Mikrospiegelelements (13) bestimmt wird. Ferner betrifft die Erfindung eine elektronische Recheneinrichtung (10), eine Mikrospiegelanordnung (12) und einen optoelektronischen Sensor (5).

Hydrophon mit einem Rohr, das einen ersten und einen zweiten Teilbereich mit jeweils einer innenliegenden Elektrode aufweist

Gezeigt ist ein Hydrophon 20 mit einem Rohr 22 mit einem ersten Teilbereich 22a und einem zweiten Teilbereich 22b, wobei der erste Teilbereich und der zweite Teilbereich jeweils eine innenliegende Elektrode aufweist, wobei der zweite Teilbereich 22b eine entgegengesetzte Polarisation zu dem ersten Teilbereich 22a aufweist. Die Elektroden des ersten und des zweiten Teilbereichs 22a, 22b sind mittels eines Isolationsbereichs 24 elektrisch gegeneinander isoliert. Der erste und der zweite Teilbereich 22 weisen eine gemeinsame außenliegende Elektrode 26 auf.

Miniature vector sensor

Anti-emi ultrasonic transducer

Cavitation sensor

Toilet flush detection system utilizing transducer with piezoelectric sounder element

An interface between two media

Sensor with vacuum-sealed cavity

Measuring fluid-borne vibrations in pipes

Determination of fluid borne vibrations in pipes non-intrusively involving measuring the amplitude of pipe vibration as a function of the electrical response of piezoelectric material deformed by the vibration. Conveniently the piezoelectric material is provided as a wire which is wound around the pipe diameter an integral number of times for accurate determination of axisymmetric n=0 vibrational modes. A suitable piezoelectric material is the biaxially orientated semicrystalline polyvinylidene difluoride polymer. In order to enable accurate measurement the piezoelectric material is held in place against the pipe with double-sided adhesive tape. The technique can be used to measure vibrations in oil, water, gas and motor car pipe installations as well as others. ...

An ultrasonic transducer for gas flow metering apparatus

Gas flow metering apparatus for use, for example, as a domestic gasmeter comprises two ultrasonic transducers spaced apart along a pipe through which the gas flows. Each transducer comprises a PVdF layer 34 of quarter wavelength thickness and a piezo-ceramic crystal 33 in a housing 35. A modulator 8 supplies an oscillatory signal to cause the interface between crystal 33 and layer 34 to oscillate thereby generating ultrasonic waves. ...

Piezoelectric sensor device

Transducers for electronic devices

BROADBAND ACOUSTIC POINT-CONTACT TRANSDUCER

An acoustic transducer (10) with a piezoelectric element (11) having a conductive tip is mounted on an electrically conductive damping mass (12), a shield (17) being provided to support the mass, wherein the conductive tip extends below the shield (17) to contact an acoustically active surface (10'). The piezoelectric element may be pointed and may have a complex wear-member (35). The damping mass (12) and conductive tip are electrically connected to opposite terminals in a coaxial line (14). In one version, the tip (33) is in contact with a flexible conductive sheet (17') for environmental protection. ...

Hydrophone and a method for manufacturing it

Vibration sensor

Systoms and methods for detecting a biological signal of a user of an article of furniture

MECHANO-ELECTRIC TWO-WAY TRANSDUCER

ELECTRONIC TRANSDUCER OF AN ACOUSTIC SIGNAL IN A PSEUDODIGITAL SIGNAL AND BIDIREKTIONELLES COMMUNICATION PROCEDURE BY ACOUSTIC WAVES

Acoustic transducer panel

Acoustic transducer

MICROMACHINED ULTRASONIC TRANSDUCERS AND METHOD OF FABRICATION

Miniature vector sensor

A vector sensor for use in acoustic instruments is described. The vector sensor includes: a cylindrical bulkhead partition defining a plurality of channels extending longitudinally on a circumferential wall of the bulkhead partition between a first surface and a second surface of the bulkhead partition; first and second cylindrical piezoelectric transducing pieces affixed to the bulkhead partition and extending outwardly as cantilever beams and contained within respective pressure housing capsules. The sensor may include cylindrical foam end pieces fitted over the capsules and having corresponding channels in their outer surfaces that correspond to channels in the bulkhead partition, so as to allow wiring and strength members to pass through. The cylindrical piezoelectric transducing pieces may be formed from a piezoelectric cylindrical tube with a first electrode covering its inner surface and a second electrode on its outer surface. The second electrode may be formed from a plurality ...

DETECTOR AND METHODS OF DETECTING

An ultrasonic detector (10) suitable for mounting in a position for surveying an area for a source of airborne ultrasound, which detector comprises a sensor (20) for detecting an ultrasonic sound signal, characterised by a transducer (64) configured to produce a broadband ultrasonic sound signal for reception by said sensor (20) enabling said ultrasonic detector to perform a self-test.

METHOD OF MEASURING VIBRATIONS BY MEANS OF PIEZOELECTRIC BODY AND THE APPARATUS THEREFOR

DEVICES AND METHODS FOR MONITORING SAFETY CABLES

One aspect of the present technology relates to a safety cable vibration monitoring system. The system includes a vibration sensor configured to be coupled to a safety cable. A vibration monitoring computing device is coupled to the vibration sensor. The vibration monitoring computing device includes a processor and a memory coupled to the processor which is configured to execute one or more programmed instructions comprising and stored in the memory to receive data from the vibration sensor. An occurrence of a fall event related to use of the safety cable is determined based on the received data from the vibration sensor. A method of monitoring a safety cable and a safety cable monitoring network are also disclosed.

ACOUSTIC RECEIVERS WITH CYLINDRICAL CRYSTALS

An acoustic receiver and method for acoustic logging. The acoustic receiver comprises a housing and a sensor subassembly, which is located within the housing. The sensor subassembly comprises a mount and a cylindrical piezoelectric crystal coupled to the mount. The sensor subassembly also comprises an isolation ring positioned between one of the ends of the cylindrical piezoelectric crystal and the mount. The isolation ring directly engages the crystal and the mount. The method of acoustic logging comprises receiving an acoustic signal using an acoustic receiver, which comprises a cylindrical piezoelectric crystal coupled to a mount without an adhesive material. The method also comprises converting the acoustic signal into an electrical signal by the cylindrical piezoelectric crystal and transmitting the electrical signal to a processor via a conductor coupled to the cylindrical piezoelectric crystal.

GRINDING MEDIA, SYSTEM AND METHOD FOR OPTIMISING COMMINUTION CIRCUIT

A freely moving grinding media adapted to measure one or more physical characteristics of a comminution apparatus during operation or a charge therein is disclosed. The grinding media comprises a freely moving grinding body with a bore disposed in an outer body portion of the body. A sensor body is configured to be received in the bore. The sensor body comprises a rigid sleeve, a resilient core and a sensor array embedded in the core of resilient material. A system of optimising performance of a comminution circuit is also disclosed. The system comprises a comminution apparatus in response to one or more physical characteristics of the comminution apparatus or the charge contained therein, measured during operation of the comminution apparatus. The system comprises a plurality of the freely moving grinding media. A method of optimising performance of a comminution circuit is also disclosed.

DIAGNOSTIC LAYER AND METHODS FOR DETECTING STRUCTURAL INTEGRITY OF COMPOSITE AND METALLIC MATERIALS

A diagnostic layer having a network of actuators and sensors may be incorporated into or on the surface of composite, metallic, and laminated materials for monitoring the structural health of the material. The diagnostic layer is adapted for detecting and measuring changes in the condition of the material, e.g., the site and extent of damage in the material. In a preferred embodiment, piezoelectric devices are embedded in the diagnostic layer in a network, and serve as actuators and sensors. Signals emitted from the sensors in response to physical deformation, either by an impact or as a result of stress waves generated by the actuators, are diagnostic of the current condition of the diagnostic layer. The diagnostic layer is also adapted to monitor the curing process of a composite material and accurately determine when curing is complete. Methods for monitoring changes in conditions of a material are also disclosed.

FORCE SENSOR AND METHOD FOR TESTING ITS RELIABILITY

The invention relates to a force sensor comprising a transducer with a measuring element operatively connected to a measuring object for generating measuring signals of a force acting on the measuring object, and two transmission channels configured to transmit mutually corresponding signals of said measuring signals independently from one another. The invention also relates to a method for testing the operational reliability of such a force sensor. To allow an easier production of the force sensor and/or to provide the force sensor with an improved operational characteristics, the invention suggests that said transmission channels are connected in parallel to the same transducer such that the transmitted signals at the output of each transmission channel can be verified. In an according testing method, a test signal is evaluated in a transmission channel in which the test signal has been injected and in another transmission channel in which the test signal has not been injected. In another ...

MEASURING CIRCUIT

A measuring circuit comprising a symmetric transmission line connecting a transducer to a measurement amplifier and to a fault indicating signal amplifier, the transducer delivering symmetric input signals to said amplifiers, the first amplifier delivering a measuring signal representing the difference of its input signals and the fault indicating signal amplifier delivering a fault indicating signal representing the sum of the input signals. An auxiliary signal injected to the terminals of the transducer the invention enables the measuring circuit to evaluate the quality of the measuring circuit during operation of the tested machine and also when the machine is at rest .

ARRANGEMENT AT A HOLLOW BODY FOR SCANNING AND ANALYZING EMISSIONS OF ACOUSTIC SIGNALS AND ULTRASONIC SIGNALS.

STRESS WAVE TRANSDUCER.

Measurement circuit and its use

The measurement circuit comprises a symmetrical transmission line (L) connecting a symmetrical piezoelectric transducer (T) to a measurement amplifier (S1) and a failure amplifier (A3). The transducer delivers symmetrical input signals to the measurement and failure amplifiers. The measurement amplifier (S1) delivers a measurement signal (Eo) representing the difference in the input signals and the failure amplifier (A3) delivers a failure signal (Ed) representing the sum of the input signals. Used for evaluating the quality of the measurement circuit as regards failures such as breaks, short-circuits etc. Possibility of detecting the location of a failure on the transmission line and of detecting the parasitic signals induced from outside in the measurement system. ...

Passive microphone.

Selon linvention capteur dondes acoustiques de surface (SAW) qui comprend (Fig. 1). un substrat piézo-électrique (1) adapté à la propagation des ondes acoustiques de surface à faibles pertes, au moins un transducteur interdigité (2a) approprié pour lexcitation et la réception efficace de SAW situé sur ledit substrat dans un canal acoustique, une membrane conductrice (3) suspendue à une distance (d, 4), petite par rapport à la période dudit transducteur au-dessus du canal acoustique. Le capteur fonctionne de la manière suivante: le signal dinterrogation une impulsion RF vient (soit par liaison filaire ou par voie radio ou transducteur (2a) et excite des ondes acoustiques de surface SAW qui se propagent au réflecteur (5) et sont réfléchis. Puis ils sont réceptionnés par le transducteur 2a et sont renvoyé à linterrogateur. Lors du passage sous la membrane, en environ une microseconde, la vitesse des ondes SAW est influencée par la position de la membrane à ce moment particulier, déterminée ...

Koerperschallmelder for a break-down alarm system.

Sound emission receiver.

Procedure for measuring and/or rules of the peak-to-peak swing of an ultrasonic oscillator as well as ultrasonic sealing device.

Die Erfindung bezieht sich auf ein Verfahren zum Messen und/oder Regeln der Schwingungsamplitude eines Ultraschallschwingers (17) einer Ultraschallvorrichtung. Um auf einfache Weise die Schwingungsamplitude des Ultraschallschwingers (17) zu messen bzw. zu regeln, wird vorgeschlagen, dass zumindest einem Bauelement des Ultraschallschwingers (17) ein die Schwingungsamplitude erfassender Sensor zugeordnet wird.

A roller screw drive with SAW (surface acoustic wave) - the sensor.

Die Erfindung betrifft einen Rollengewindetrieb (10), der eine Schraube (12) umfasst, eine Mutter (16), die um und koaxial mit der genannten Schraube (12) angeordnet ist, mehrere Rollen (20), die in einem radialen Zwischenraum (22) zwischen der Schraube (12) und der Mutter (16) angeordnet sind, jeweils an ihren Enden mit Aussenverzahnungen (26, 28) versehen sind und die axial beiderseits des Aussengewindes (24) angeordnet sind. Kronen (34, 36), die mit der Mutter (16) fest verbunden sind und Synchronisationsinnenverzahnungen (38, 40) aufweisen, stehen mit den Aussenverzahnungen (26, 28) der genannten Rollen (20) in Eingriff. Ein Schmiermittel ist im genannten radialen Zwischenraum (22) vorgesehen. Die Mutter (16) ist mit mindestens einer zylindrischen Innenfläche (54, 56) versehen, die axial zwischen einer Krone (34, 36) und dem Innengewinde (18) der Mutter (16) angeordnet ist, wobei der Rollengewindetrieb (10) ebenfalls mindestens einen AOW(Akustische Oberflächenwellen)-Sensor (60, 62) ...

BROADBAND ULTRASONIC SENSOR AND DETECTOR COMPRISING THE SAME

ДЕТЕКТОР И СПОСОБЫ ДЕТЕКТИРОВАНИЯ

Ультразвуковой детектор (10) для установки в положение для обследования зоны источника ультразвука, распространяющегося по воздуху, причем детектор содержит датчик (20) для детектирования ультразвукового сигнала, причем детектор характеризуется тем, что содержит преобразователь (64), сконфигурированный с возможностью формирования широкополосного ультразвукового сигнала для приема датчиком (20), обеспечивая выполнение самотестирования ультразвукового детектора.

Cardiac function piezoelectric sensor

The invention discloses a cardiac function piezoelectric sensor which comprises a housing, a leading wire, conductive electrodes and a high-polymer piezoelectric material filled between conductive electrodes. The sensor adopts the high-polymer piezoelectric material to induce vibration on the body surface due to heartbeat, and converts the vibration into a corresponding electric signal to be outputted by the leading wire. The high-polymer piezoelectric material has the excellent characteristics of high response speed, high sensitivity and good linearity, and ensures the accuracy of the signal acquired by the sensor. The electric signal outputted by the cardiac function piezoelectric sensor is processed through a corresponding processing circuit to obtain a signal capable of reflecting the heartbeat function. The heartbeat signal can be used for cardiac function health analysis.

Sensor device

Ear model, artificial head, and measurement device using same, and measurement method

Integrated type physiological signal detection sensor

Weak acoustic wave detector based on graphene

SENSOR HAS ULTRASOUNDS

APPARATUS TO MEASURE PHYSICAL PROPERTIES Of a MEDIUM, IN PARTICULAR the PROPERTIES RHEOLOGICAL.

NONDESTRUCTIVE INSPECTING DEVICE Of a STRUTURE BY VIBRATORY ANALYSIS

CAPTEUR DE VIBRATION PIEZOELECTRIQUE

Le capteur 500 comprend un corps de boîtier 508, 509 avec une partie de boulon d'ancrage 506 et un ensemble sensible vibrant 514, composé d'un élément piézoélectrique accolé à une lame métallique, fixé par un écrou 516 sur la base 512 du couvercle 504 du capteur, un connecteur de raccordement 517 traversant l'ensemble de ces éléments et comprenant une partie filetée 515 pour recevoir l'écrou 516. Un manchon isolant 522 est prévu pour isoler l'une des électrodes du corps du boîtier. Le capteur est accordé pour être monté sur un moteur et en détecter les conditions de cognements pour piloter un système électronique de commande du moteur. (CF DESSIN DANS BOPI) ...

VACUUM SEALED CAVITY WITH SENSOR

L'invention se rapporte à un procédé et un appareil pour la détection de bruits sous-marins. Une forme de réalisation de l'appareil comprend un substrat (150) avec une cavité scellée sous vide (140). Une structure de support (130) et un capteur de pression acoustique sont situés sur le substrat (150). La structure de support (130) de l'appareil peut comprendre une première couche d'oxyde (130b) située sur le substrat (150), une couche de silicium (130c) située sur la première couche d'oxyde (130b), et une deuxième couche d'oxyde (130a) située sur la couche de silicium (130c). Le capteur de pression acoustique de l'appareil comprend une première couche d'électrode (110c) située sur le substrat (150), une couche piézoélectrique (110b) située sur la première couche d'électrode (110c), et une deuxième couche d'électrode (110a) située sur la couche piézoélectrique (110b).

Vibration sensor for e.g. pump, has piezoelectric element with resonance frequency when it is subjected to mechanical vibrations, and another piezoelectric element with another resonance frequency different from frequency of former element

Ce capteur comprend un premier élément (5) piézoélectrique ayant une première fréquence de résonance et un deuxième élément (6) piézoélectrique dont la fréquence de résonance est différente de la première fréquence de résonance. Application aux machines tournantes.

HYDROPHONE HAS LOW LEVEL OF DISTORTION

... - Hydrophone à très faible distorsion comportant au moins une paire d'éléments sensibles (6, 8), de type piézo-électrique (par exemple et non limitativement), associés à au moins une des faces opposées flexibles d'un boîtier (1) formé par la réunion de coupelles (2, 3) à bords rigides. - Les faces opposées d'un des disques (6) sont pourvues d'électrodes sur toute leur surface. Par contre, au moins une des électrodes (9a, 9b) associées aux faces opposées du deuxième disque (8), ne recouvre qu'une ou plusieurs portions (une bande annulaire par exemple) de chacune de ces faces, dans une zone extérieure de chaque coupelle (2, 3) plus soumise à des contraintes non linéaires. Les électrodes (7, 9) des deux disques sensibles (6, 8) sont interconnectées de façon à soustraire les signaux électriques engendrés par les deux disques en réponse aux pressions appliquées, avec l'effet vérifié expérimentalement que la distorsion résultant de cet agencement, due notamment à l'harmonique 2, est pratiquement ...

PIEZOELECTRIC SENSOR AND INSTRUMENT WITH SAID SENSOR

Device sophisticated vibration pick-up

이중 정합층을 포함하는 압전 트랜스듀서

... 이중 정합층을 포함하는 압전 트랜스듀서가 개시된다. 개시된 압전 트랜스듀서는 압전 원판; 상기 압전 원판의 하단에 위치되며, 초음파 신호의 송신에 사용되는 제1 정합층; 및 상기 제1 정합층과 동일한 레이어에 위치하며, 초음파 신호의 수신에 사용되는 제2 정합층을 포함한다.

ELECTRONIC CONVERSION DEVICE FOR CONVERTING ACOUSTIC SIGNAL TO SEMIDIGITAL SIGNAL, INDICATOR HAVING THE SAME, AND METHOD FOR BIDIRECTION COMMUNICATION BY SOUNDWAVE

PURPOSE: An electronic conversion device for converting acoustic signals to semi-digital signals, an indicator having the same, and a bidirectional communication method using a sonic wave are provided to generate sonic waves and convert the sonic waves to a logic voltage for controlling a microprocessor for exchanging all kinds of data by the sonic waves between two separated objects by simply adding a comparison circuit. CONSTITUTION: An electronic conversion device(20) for converting acoustic signals to semi-digital signals includes an acoustic generator circuit(22) incorporating a piezoelectric vibrator(P3) in addition to a reference voltage supplying element, and a comparison element which compares a voltage generated by the piezoelectric vibrator when obtaining a sonic wave with a reference voltage and generates a semi-digital signal when the voltage generated by the piezoelectric vibrator exceeds the reference voltage. © KIPO 2002 ...

Una capsula detectora para detectar la polarización de las ondas que se propagan en las cuerdas de instrumentos musicales de cuerdas.

Una capsula detectora (100) para detectar la polarización de las ondas que se propagan en las cuerdas (40) de instrumentos musicales de cuerdas, que comprende: para cada cuerda (10) del instrumento musical de cuerdas (40), la capsula detectora (100) está constituido por un disco piezoeléctrico (10) dividido en cuatro cuadrantes (20), que sostiene la respectiva cuerda (40) como puente del instrumento musical de cuerdas (40); al vibrar la cuerda (40) el disco piezoeléctrico (10) se deforma, produciéndose cuatro señales eléctricas provenientes de cada una de los cuadrantes (20), en donde las señales eléctricas provenientes de cada una de los cuadrantes (20) opuestos, son restadas mediante dos amplificadores diferenciales (50) y (60), con lo cual se obtienen dos señales de salida proporcionales al plano de polarización de la cuerda (40); para cada cuerda (40) del instrumento musical de cuerdas (40), la capsula detectora (100), está constituido por un cilindro (90) que sostiene el disco piezoeléctrico ...

ULTRASONIC-BASED MEASURING SENSOR AND METHOD FOR OPERATING AN ULTRASONIC-BASED MEASURING SENSOR

The invention relates to an ultrasonic-based measuring sensor (10a - 10e), like distance sensor or dead angle sensor, having a membrane element (16) that can be electrically exited to vibrations by way of an actuating unit (20). According to the invention, the actuating unit (20) and/or the membrane element (16) are configured to carry out a heating mode that is modified with respect to the measuring mode, wherein the membrane element (16) heats up to a temperature (T), which is above an ice-formation temperature, and the heating mode comprises an actuation of the membrane element (16) that is extended or/and a at higher frequency relative to the measuring mode.

AN ACOUSTIC EMISSION TRANSDUCER AND AN ELECTRICAL OSCILLATOR

A problem with prior art acoustic emission transducers is that for operation at lower frequencies, i.e. for resonance at 40-60KHz, the size of the piezoceramic element has to be relatively large to obtain a resonance of the acoustic emission waves within the piezoceramic element. This requires the use of relatively expensive and difficult or complex manufacturing processes. An acoustic emission transducer assembly (40) as provided by the invention can be used at the relatively low frequencies desired, is relatively small and is cheap and easy to manufacture. The acoustic emission transducer assembly (40) comprises a brass base disc (42), a piezoceramic disc (44) and a brass case (46). The base disc (42) and the piezoceramic disc (44) are arranged coaxially, and the annular peripheral region (54) only of the piezoceramic disc (44) is mounted on an annular projection (48) which extends axially from the base disc (42). The annular projection (48) is provided with apertures (52) to prevent ...

CYLINDRICAL ULTRASOUND RECEIVERS AND TRANSCEIVERS FORMED FROM PIEZOELECTRIC FILM

An ultrasound receiver (20) includes a hollow cylinder (22) formed primarily from flexible piezoelectric film, the hollow cylinder (22) having an outer surface (24) an inner surface (26), a central axis (28) and a height measured parallel to the central axis (28). A sensing electrode is formed from conductive material applied to the surface, while a grounded electrode (32) is formed from conductive material applied to the outer surface (24). The hollow cylinder (2) is supported by a support structure configured to allow propagation of vibration waves circumferentially around a major part of the hollow cylinder (22). The sensing electrode is formed as a strip extending in an extensional direction substantially parallel to the central axis (28) along a major part of the height, the strip subtending at the central axis (28) at an angle of not more than 90 degrees.

Vibration pickup and an insulating disk for a vibration pickup

A vibration sensor (1) is provided for direct or indirect mounting on a vibrating component such as an engine block. The vibration sensor has a housing (10) and a pressure sleeve (2), which includes a central bore (14), a cylindrical area (12) and a flange-like edge (13). A piezoelectric disk (3) is situated between two contact disks (7). A seismic mass (4) acts on piezoelectric disk (3) by way of a spring element (5) and a threaded ring (6). Insulating disks (8) are situated on the sides of the contact disks (7) facing away from the piezoelectric disk (3). The insulating disks (8) have an inside diameter (D1) that is less than an outside diameter (D2) of the cylindrical area (12) of the pressure sleeve (2).

Flight state detection apparatus of micro object and flight state detection method of micro object

Disclosed herein is a flight state detection apparatus and a flight state detection method that is capable of accurately detecting the flight state of a micro object ejected from a micro object ejection part. The flight state detection apparatus is constructed in a simplified structure and is manufactured at low costs. The flight state detection apparatus includes a sensor substrate, a piezoelectric/electrostrictive element, and an aperture plate. The sensor substrate includes a thick support part and a vibrating plate supported by the thick support part in a cantilever shape. The piezoelectric/electrostrictive element is mounted to a fixed end side of the vibrating plate. In the aperture plate, an aperture is formed, which is opposite to a target part disposed at a free end side of the vibrating plate. When the micro object passes through the aperture, and then collides with the target part, the vibrating plate is vibrated, and an electromotive force corresponding to the vibration state ...

Acoustic wave sensor and method of making same

A hydrophone for calibrating lithotripters includes a spot poled disc of piezoelectric material which is mounted on a brass cylinder backing. A coaxial cable is electrically connected to one surface of the disc through the brass backing and the opposing surface of the disc. A mixture of polymeric material and microballoons is provided to protect the interconnection of the center conductor and the opposing surface of the disc and prevent damage due to the incident ultrasonic shock waves. The brass backing is placed in a suitable housing of phenolic material. A process in fabricating the piezoelectric disc and assembling the hydrophone is disclosed.

Charge converter for vibration monitoring instrumentation

Apparatus for monitoring mechanical vibrations in a component part of an operating machine such as a large electrical power generator includes an electric charge producing transducer, preferably a piezoelectric accelerometer, affixed to the component part of the machine to be monitored, and a charge converter network located within the machine but relatively remote from the transducer. The charge converter network accepts the signal from the transducer, in the form of electrical charge generated at a rate and magnitude representative of the mechanical vibrations, and converts the charge signal to a conventional electronic signal. The charge converter network includes a differential operational amplifier having a resistive-capacitive feedback network providing equal impedance values to a corresponding resistive-capacitive network at the noninverting input of the amplifier. The transducer output is applied between the differential input terminals of the amplifier. The output signal is substantially ...

Active damage interrogation method for structural health monitoring

An active damage interrogation (ADI) system (and method) which utilizes an array of piezoelectric transducers attached to or embedded within the structure for both actuation and sensing. The ADI system actively interrogates the structure through broadband excitation of the transducers. The transducer (sensor) signals are digitized and the transfer function of each actuator/sensor pair is computed. The ADI system compares the computed transfer function magnitude and phase spectrum for each actuator/sensor pair to a baseline transfer function for that actuator/sensor pair which is computed by averaging several sets of data obtained with the structure in an undamaged state. The difference between the current transfer function and the baseline transfer function for each actuator/sensor pair is normalized by the standard deviation associated with that baseline transfer function. The transfer function deviation for each actuator/sensor pair is then represented in terms of the number of standard ...

Ultrasound sensor

The invention relates to an Ultrasound Sensor, especially for a vehicle and the passenger compartment thereof, comprising a can-shaped housing, a housing base, a housing closure and a sensor element arranged at the base inside the housing, and in the area of the housing closure there is arranged a contact device which is attachable, in locally fixed fashion, inside housing; the contact device presenting, in the direction of the longitudinal axis, a penetrating recess and being connected, in electrically conductive fashion, in at least one contact point with at least one electrode of the sensor element by means of thick-stranded wire. The invention also relates to a method for producing the Ultrasound Sensor.

Sensor

According to embodiments, a sensor includes a structure body, a container, a liquid and a sensing unit. The structure body includes a supporter, and a film unit. The film unit includes a first region. The first region includes a first end portion supported by the supporter, and a first portion being displaceable. The film unit includes an opening. The container is connected to the structure body. A first space is defined between the film unit and the container. The liquid is provided inside the first space. The sensing unit senses a displacement of the first portion accompanying a displacement of the liquid.

Piezoelectric transducer apparatus having independent gain and phase characteristics functions

A piezoelectric transducer apparatus comprises at least one piezoelectric unit and a body structure. Each of the at least one piezoelectric unit has a piezoelectric block and at least one pair of electrodes. Each electrode is adhered to one surface of the piezoelectric block. Each of the at least one piezoelectric unit is adhered to the surface of the body structure with the electrode exposed externally. The electrode shape of the electrode of each of the at least one piezoelectric unit is matched to a desired body strain pattern existing in the body structure wherein the electrode of each of the at least one piezoelectric unit may excite a strain pattern in the body structure that is the same as the desired body strain pattern. The body structure of any structural configuration may have a resolved electrode shape that results in the disengagement of the phase and gain characteristics of the piezoelectric construction based on that particular body structure.

COMBINED CORRUGATED PIEZOELECTRIC MICROPHONE AND CORRUGATED PIEZOELECTRIC VIBRATION SENSOR

A combined MicroElectroMechanical structure (MEMS) includes a first piezoelectric membrane having one or more first electrodes, the first piezoelectric membrane being affixed between a first holder and a second holder; and a second piezoelectric membrane having an inertial mass and one or more second electrodes, the second piezoelectric membrane being affixed between the second holder and a third holder.

IMPLANTABLE DISTRACTION DEVICE

The present invention relates to a monitoring method for generating a distraction indicator, including: receiving data from an implantable bone distraction device, corresponding to a mechanical vibration response of a medium comprising the implantable bone distraction device, as measured by at least one vibration sensor; computing from the received data a distraction indicator through at least the steps of: determining at least one vibration pattern of said medium from the vibration response measured by the at least one vibration sensor; analyzing the evolution of a first value of the at least one vibration pattern of said medium determined from the measured vibration response during a first period; and generating a distraction indicator as a function of the first value.

Imaging devices having piezoelectric transceivers with harmonic characteristics

Described are micromachined ultrasonic transducers (MUTs) with convex or concave electrodes, which have enhanced pressure amplitude and frequency response behavior when driven at fundamental and harmonic frequencies, as well as methods of making the same.

VIBRATION METER

DIAGNOSTIC LAYER AND METHODS FOR DETECTING STRUCTURAL INTEGRITY OF COMPOSITE AND METALLIC MATERIALS

A diagnostic layer (10) having a network of actuators and sensors (14) may be incorporated into or on the surface of composite, metallic, and laminated materials (12) for monitoring the structural health of the material. The diagnostic layer (10) is adapted for detecting and measuring changes in the condition of the material, e.g., the site and extent of damage in the material. In a preferred embodiment, piezoelectric devices are embedded in the diagnostic layer in a network, and serve as actuators and sensors. Signals emitted from the sensors in response to physical deformation, either by an impact or as a result of stress waves generated (10) by actuators, are diagnostic of the current condition of the diagnostic layer. The diagnostic layer is also adapted to monitor the curing process of a composite material and accurately determine when curing is complete. Methods for monitoring changes in conditions of a material are also disclosed.

PROBE FOR MEASURING ACOUSTIC FIELDS OF HIGH INTENSITY

A probe for measuring acoustic fields of high intensity is comprised of an electroacoustic transducer system and an electronic conditioning system for the signal. The electro-acoustic transducer system is made with a piece of piezoelectric material. Its special design, letting the piezoelectric element in floating conditions, enables the systems to act both as mechanical support and electromagnetic screen of the system. The active element of the probe floats in a viscous and dispersive elastic substance which is highly attenuating. This confers to the element excellent characteristics of frequency response with the disclosed embodiment. Furthermore, the system of electric connexion of the probe makes possible to have the earth connexion at one or a plurality of points of the device. The electronic signal conditionning system effects an appropriate adaptation of impedance and signal level, between the piezoelectric element and the connexion screen cable. The disclosed device applies to the ...

IMAGING AND SENSING OF THIN LAYER USING HIGH-FREQUENCY ULTRASONIC TRANSDUCERS

KNOCKING SENSOR

PURPOSE: To make an electric connection between a vibrator and a pin easy, and to improve productivity, by a method wherein one end of a lead terminal is welded to a metal sheet, and the other end is connected to a pin. CONSTITUTION: On a connector section 4, a metal base 3, a ceramic substrate 6 and a piezoelectric vibrator 2 are provided in turn, and the vibrator 2 is fixed to the metal base 3 by screws through a washer 1. One end 20 of a lead terminal 18 is designed to be welded and fixed to a metal sheet 8, and the other end 19 is designed to be inserted into a pin 12. The inserting end 19 is soldered by 21, when inserted into the pin 12. The metal sheets 8 and 9 are previously soldered or adhered by utilizing adhesives etc. to the piezoelectric vibrator 2, so that the length of the vibrator is projected from the metal sheets 8 and 9. COPYRIGHT: (C)1983,JPO&Japio ...

КОНТРОЛЬ ОСЕВОЙ ВИБРАЦИИ ДЛЯ ОБНАРУЖЕНИЯ НЕСООСНОСТИ ВАЛОВ В ТУРБОМАШИННЫХ УСТАНОВКАХ

Изобретение относится к технике измерения и контроля осевых вибраций. Система для определения несоосности валов в турбомашинной установке (10), имеющей множество компонентов (12, 14, 16) с последовательно соединенными вращающимися валами (24, 26, 28), содержит датчик (30A, 30B и 30C), прикрепленный к компоненту (12, 14, 16) турбомашинной установки (10) вблизи вращающегося вала (24, 26, 28), где этот датчик (30A, 30B и 30C) собирает данные (50) о вибрации вдоль оси вращающегося вала (24, 26, 28). Также имеется частотный анализатор (52) для формирования данных в частотной области из данных о вибрации и система (54) анализа для анализа частотного компонента (12, 14, 16) данных в частотной области на однократной частоте вращения вращающегося вала (24, 26, 28) для идентификации несоосности между вращающимся валом (24, 26, 28) и соединенным с ним соседним вращающимся валом (24, 26, 28). Технический результат заключается в возможности контролирования несоосности вращающихся валов. 2 н. и 8 з.п ...

СПОСОБ МОНИТОРИНГА УСТРОЙСТВА, ПОВЫШАЮЩЕГО БЕЗОПАСНОСТЬ ДОРОЖНОГО ДВИЖЕНИЯ, ДЛЯ ОБНАРУЖЕНИЯ СТОЛКНОВЕНИЯ ТРАНСПОРТНОГО СРЕДСТВА С УСТРОЙСТВОМ, ПОВЫШАЮЩИМ БЕЗОПАСНОСТЬ ДОРОЖНОГО ДВИЖЕНИЯ, И УЗЕЛ, СОДЕРЖАЩИЙ УСТРОЙСТВО, ПОВЫШАЮЩЕЕ БЕЗОПАСНОСТЬ ДОРОЖНОГО ДВИЖЕНИЯ

Изобретение относится к области техники, связанной с мониторингом устройств, повышающих безопасность дорожного движения. Узел (100) содержит каркас (2a), жестко прикрепленный к поверхности дороги и расположенный на ней, и необратимо деформируемую часть (2b), соединенную с каркасом (2a) для поглощения по меньшей мере части кинетической энергии транспортного средства, и систему (1) мониторинга устройства (2), повышающего безопасность дорожного движения, для выявления столкновения транспортного средства с устройством (2), повышающим безопасность дорожного движения. Система (1) мониторинга устройства (2), содержит блок (3) управления; средства (4) получения изображения для получения по меньшей мере изображения номерного знака транспортного средства, которое приближается к устройству (2), повышающему безопасность дорожного движения, причем указанные средства (4) получения изображения соединены с блоком (3) управления; запоминающее устройство (5) для хранения по меньшей мере изображения, получаемого ...

Устройство для диагностики оборудования (измерительный канал)

Изобретение относится к вибрационной метрологии. Устройство для диагностики оборудования состоит из первичного и вторичного преобразователей. Первичный преобразователь содержит датчик температуры, низкочастотный фильтр, усилитель заряда, нормирующий усилитель, выходной каскад, вибродатчик, преобразователь переменного напряжения в ток. Вторичный преобразователь содержит барьер искрозащиты, буферный каскад, преобразователь постоянного напряжения в ток, пропорциональный фильтр, второй буферный каскад, фильтр верхних частот, полосовой фильтр, пиковый детектор, второй преобразователь постоянного напряжения в ток, интегратор, детектор среднеквадратичного значения, третий преобразователь постоянного напряжения в ток, узкополосный фильтр, второй пиковый детектор, детектор средних значений, логарифматор, первый и второй буферные усредняющие каскады, второй логарифматор. Датчик вибрации состоит из пьезобиморфа, болта из немагнитной стали, прецизионных шайб. Корпус первичного преобразователя содержит ...

УЛЬТРАЗВУКОВОЙ ДЕФЕКТОСКОП, СПОСОБ УЛЬТРАЗВУКОВОЙ ДЕФЕКТОСКОПИИ И СПОСОБ ИЗГОТОВЛЕНИЯ ИЗДЕЛИЯ

Использование: для ультразвуковой дефектоскопии. Сущность изобретения заключается в том, что ультразвуковой дефектоскоп содержит датчик-решетку, схему определения группы элементов, вычислитель, приёмник сигналов и генератор. Датчик-решетка содержит множество пьезоэлектрических элементов, причём каждый из указанного множества пьезоэлектрических элементов выполнен с возможностью передавать и принимать ультразвуковую волну в контролируемый объект и от него. Схема определения группы элементов выполнена с возможностью выбирать в качестве группы элементов несколько последовательных пьезоэлектрических элементов из указанного множества пьезоэлектрических элементов; устанавливать начальное положение группы элементов на основе информации о компоновке решётки из указанного множества пьезоэлектрических элементов в группе элементов и на основе весового значения для каждого из указанного множества пьезоэлектрических элементов в группе элементов, а также вычислять траектории распространения ультразвукового ...

ИНТЕГРАЛЬНЫЙ ДАТЧИК ОБНАРУЖЕНИЯ ФИЗИОЛОГИЧЕСКИХ СИГНАЛОВ

Изобретение относится к измерительной технике, в частности к интегральным датчикам обнаружения вибрационных физиологических сигналов. Датчик содержит подвижную часть корпуса, неподвижную часть корпуса, схемную плату измерительного блока. Подвижная и неподвижная части корпуса соединены с образованием внутреннего пространства между ними. Плата неподвижно установлена на неподвижной части корпуса внутри данного пространства. К плате прикреплена пьезоэлектрическая пленка. Периферию пьезоэлектрической пленки окружает вырезанный участок. На подвижном элементе корпуса в положении, соответствующем пьезоэлектрической пленке, предусмотрен выступ. На противоположные поверхности подвижной и неподвижной частей корпуса нанесен защитный слой. Технический результат - упрощение монтажа датчика, улучшение целостности сигнала, упрощение схемы, повышение точности измерений. 6 з.п. ф-лы, 3 ил.

Устройство измерения выходных характеристик волоконно-оптических фотоакустических излучателей

Полезная модель относится к области оптоакустики и может быть использована для одновременного определения эффективности фотоакустического преобразования и измерения частотной характеристики энергетического отклика волоконно-оптического фотоакустического излучателя (ВОФИ) в зависимости от параметров модуляции оптического сигнала для ультразвуковых систем технической диагностики и биомедицинских исследований высокого пространственного разрешения.Задача полезной модели заключается в создании устройства измерения выходных характеристик ВОФИ, позволяющего одновременно измерять частотную характеристику энергетического отклика и эффективность фотоакустического преобразования ВОФИ.Задача достигается тем, что устройство измерения выходных характеристик ВОФИ, содержащее генератор электрических сигналов произвольной формы, соединенный с волоконно-оптическим лазерным модулем, дополнительно содержит на выходе волоконно-оптического лазерного модуля волоконно-оптический разветвитель 1×2, первый вывод которого соединен с контрольным фотодиодом, подключенным к первому порту осциллографа, второй вывод волоконно-оптического разветвителя 1×2 соединен через волоконно-оптический изолятор с помощью волоконно-оптической розетки с исследуемым ВОФИ, закрепленным на трехмерной координатной юстировочной системе в кювете, заполненной необходимым для работы исследуемого ВОФИ веществом, напротив приемника акустических колебаний, подключенного ко второму порту осциллографа. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 208 295 U1 (51) МПК G01H 11/08 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК G01H 11/08 (2021.05) (21)(22) Заявка: 2021113152, 05.05.2021 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Белорусский государственный университет (БГУ) (BY) Дата регистрации: 13.12.2021 (56) Список документов, цитированных в отчете о поиске: RU 2605639 C1, 27.12.2016. US 2006182153 A1, 17.08.2006. TW 201801486 A, 01.01 ...

Self-exciting, self-sensing piezoelectric cantilever sensor for detection of airborne analytes directly in air

A method for detection of airborne biological agent using a piezoelectric cantilever sensor that includes a piezoelectric layer and a non-piezoelectric layer. A recognition entity is placed on one or both of the two layers. The antibody that recognizes and binds to the airborne species may be chemically immobilized on the cantilever sensor surface. In one embodiment, the cantilever sensor is attached to a base at only one end. In another embodiment, the sensor includes first and second bases and at least one of the piezoelectric layer and the non-piezoelectric layer is affixed to each of the first and second bases to form a piezoelectric cantilever beam sensor. In this embodiment, resonance is measured via stress on the piezoelectric layer and it has been demonstrated that such sensors are robust and exhibit excellent sensing characteristics in gaseous media with sufficient sensitivity to detect airborne species at relatively low concentrations.

Ultrasonic device

An ultrasonic device is configured to transmit ultrasonic waves and includes a substrate, a diaphragm, a piezoelectric member and a control unit. The substrate has an opening. The diaphragm covers the opening of the substrate. The piezoelectric member is coupled to the diaphragm, and includes a first piezoelectric part and a second piezoelectric part. The control unit controls a voltage applied to the first piezoelectric part to be a vibration voltage and controls a voltage applied to the second piezoelectric part to be a constant voltage when the ultrasonic device transmits the ultrasonic waves.

System and method for strain and acoustic emission monitoring

A device is provided for monitoring strain and acoustic emission in an object. The device includes: a strain measurement portion operable to measure strain; an adhesive layer disposed on the strain measurement portion; and a peel-off mask disposed on the adhesive layer. In an example embodiment, the strain measurement portion includes a body, a transparent window portion, a strain measurement device and a signal processing portion. The body includes an attachment surface, wherein the adhesive layer is disposed on the attachment surface for attachment of the body to the object. The transparent window portion is arranged to enable viewing of a portion of the object through the body. The strain measurement device is disposed within the transparent window portion and is operable to generate a strain signal based on strain in the object. The signal processing portion is operable to generate a processed signal based on the strain signal.

ASYMMETRIC SENSOR

An asymmetric sensor having asymmetric electrodes and/or being asymmetrically anchored provides enhanced sensitivity. In example embodiments, part of the electrode on a sensor is etched or removed resulting in enhanced mass-change sensitive resonant modes. In another example embodiment, a sensor is anchored asymmetrically, also resulting in enhanced mass-change sensitive resonant modes. By asymmetrically anchoring a piezoelectric portion of a sensor, resonant bending modes of the sensor can be measured electrically without external instrumentation. Modifying the electrode of a piezoelectric cantilever enables expression of mass-change sensitive resonant modes that normally do not lend themselves to electrical measurement. 1. An asymmetrically anchored sensor , wherein:anchoring on one side of the sensor is longer than anchoring on another side of the sensor; andresonant bending modes of the sensor are measurable without external instrumentation for measuring sensor oscillation.2. The sensor of claim 1 , wherein the sensor is a cantilever sensor.3. The sensor of claim 1 , wherein the sensor is a piezoelectric cantilever sensor.4. The sensor of claim 1 , wherein the resonant bending modes of the sensor are electrically measurable without external instrumentation for measuring sensor oscillation.5. The sensor of claim 1 , wherein:the sensor is a piezoelectric cantilever sensor; anddifferential longitudinal deformation occurs inducing transverse vibration that causes a detectable charge accumulation in bending mode resonances of the sensor.6. The sensor of claim 1 , wherein the sensor comprises lead zirconate titanate/7. A sensor comprising asymmetric electrode portions claim 1 , wherein:an electrode on one side of the sensor is longer than an electrode on another side of the sensor; anddifferential longitudinal deformation occurs inducing bending modes.8. The sensor of claim 7 , wherein the sensor is a cantilever sensor.9. The sensor of claim 7 , wherein the sensor is ...

Vibration meter

A compact vibration meter has at least two vibration sensors which sense vibrations at regions of a support element, the detected vibrations being adjusted to the frequency range to be sensed by the respective sensor.

SURFACE ACOUSTIC WAVE MONITOR FOR DEPOSITION AND ANALYSIS OF ULTRA-THIN FILMS

A surface acoustic wave (SAW) based thin film deposition monitor device and system for monitoring the deposition of ultra-thin films and nanomaterials and the analysis thereof is characterized by acoustic wave device embodiments that include differential delay line device designs, and which can optionally have integral reference devices fabricated on the same substrate as the sensing device, or on a separate device in thermal contact with the film monitoring/analysis device, in order to provide inherently temperature compensated measurements. These deposition monitor and analysis devices can include inherent temperature compensation, higher sensitivity to surface interactions than quartz crystal microbalance (QCM) devices, and the ability to operate at extreme temperatures. 1. A surface acoustic wave film deposition monitoring and analysis device , comprising(a) a piezoelectric substrate;(b) at least one first transducer arranged on at least a portion of said piezoelectric substrate wherein said first transducer has electrode structures so as to be capable of generating and receiving acoustic waves at desired frequencies;(c) at least one second surface acoustic wave element formed on said piezoelectric substrate and spaced from said first transducer along the direction of acoustic wave propagation at a distance to create a first acoustic delay, said at least one second surface acoustic wave element comprising electrode structures capable of interacting with acoustic waves at frequencies that correspond to the frequencies generated by said first transducer;(d) at least one third surface acoustic wave element formed on said piezoelectric substrate and spaced from said first transducer along the direction of acoustic, wave propagation at a distance to create a second acoustic delay, said at least one second surface acoustic wave element comprising electrode structures capable of interacting with acoustic waves at frequencies that correspond to the frequencies generated ...

METHOD AND SYSTEM FOR LEAK DETECTION IN A PIPE NETWORK

A method and device for leak detection and localization in at least a portion of a of fluid distribution system. At each of two or more locations, a position locator determines the location of the device and a vibration sensor generates a signal indicative of vibrations detected by the vibration sensor at the location. A processor calculates a parameter of the signal indicative of an average power of the signal at the location over a predetermined time period. For each location, the processor stores in a memory the location of the device and the value of calculated parameter, and then determines a location in the fluid distribution system where the calculated parameter has a maximum value satisfying a predetermined criterion. 120-. (canceled)21. A vibration sensor for leak detection comprising:(a) a support structure(b) a Piezo membrane;(c) at least one inertial mass; and(d) an elastomeric layer configured to damp the piezoelectric element oscillations.22. The vibration sensor according to claim 21 , further comprising a metal plate in contact with the piezoelectric element.23. The vibration sensor according to claim 21 , further comprising a second inertial mass being a second vibrational damping elastomeric layer between the first and the second inertial masses.24. The vibration sensor according to claim 21 , wherein the support structure is made of plastic or metal.25. The vibration sensor according to claim 21 , having a resonance frequency range being in the range of vibration frequencies indicative of a water leakage.26. The vibration sensor according to claim 21 , having a Q factor that is less than 10.27. A portable device for leak detection and localization in at least a portion of a fluid distribution system claim 21 , the fluid distribution system including at least part of a pipe network claim 21 , comprising:(a) a vibration sensor configured to generate a signal indicative of vibrations when placed in contact with a pipe or a medium or substance ...

OBJECT CHARACTERISTICS MEASUREMENT APPARATUS

An object characteristics measurement apparatus of the invention includes a surface acoustic wave device. The surface acoustic wave device includes: an interdigitated electrode that is formed on a first surface on a piezoelectric substrate, excites an elastic wave, and receives reflection based on the elastic wave; a reflector that has a third surface and a fourth surface between the interdigitated electrode and a second surface orthogonal to the first surface in a propagation direction of the elastic wave; a reaction field that is formed between the interdigitated electrode and the reflector, in which the measured object is to be loaded; and a propagator that is formed between the reflector and the second surface. 1. An object characteristics measurement apparatus , comprising a surface acoustic wave device ,the surface acoustic wave device comprising:an interdigitated electrode that is formed on a first surface on a piezoelectric substrate, excites an elastic wave, and receives reflection based on the elastic wave;a reflector that has a third surface and a fourth surface between the interdigitated electrode and a second surface orthogonal to the first surface of the piezoelectric substrate in a propagation direction of the elastic wave, the third surface being formed at a position different from that of the first surface in a normal direction of the first surface, the fourth surface connecting an end of the first surface, which is formed perpendicular to the normal direction of the first surface, to the third surface;a reaction field that is formed between the interdigitated electrode and the reflector, in which the measured object is to be loaded; anda propagator that is formed between the reflector and the second surface, whereina surface acoustic wave is separated and extracted from a bulk wave, and characteristics of the measured object are determined based on the extracted surface acoustic wave, the surface acoustic wave propagating along the reaction field ...

PIEZOELECTRIC MATERIAL, PIEZOELECTRIC ELEMENT, LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS, ULTRASONIC SENSOR, PIEZOELECTRIC MOTOR, AND POWER GENERATOR

A piezoelectric material contains a first component that is a rhombohedral crystal and that is configured to have a complex oxide with a perovskite structure and Curie temperature Tc1, a second component that is a crystal other than a rhombohedral crystal and that is configured to have a complex oxide with a perovskite structure and Curie temperature e Tc2, and a third component that is a rhombohedral crystal and that is configured to have a complex oxide with a perovskite structure and Curie temperature Tc3 different from the first component, and in which Tc2 is higher than Tc1, Tc3 is equal to or higher than Tc2, and a value of (0.1×Tc1+0.9×Tc2) is equal to or lower than 280° C. 1. A piezoelectric material containing:a first component that is a rhombohedral crystal and that has a complex oxide with a perovskite structure and Curie temperature Tc1;a second component that is a crystal other than a rhombohedral crystal and has a complex oxide with the perovskite structure and Curie temperature Tc2; anda third component that is a rhombohedral crystal and has a complex oxide with the perovskite structure and Curie temperature Tc3, the third component being different from the first component,wherein Tc2 is higher than Tc1, Tc3 is equal to or higher than Tc2, and a value of (0.1×Tc1+0.9×Tc2) is equal to or lower than 280° C.2. The piezoelectric material according to claim 1 ,wherein a composition near an MPB line is provided in a phase diagram that employs a ratio of the first component to the sum of the first component and the second component for a horizontal axis, and temperature for a vertical axis, andwherein a Curie temperature Tc4 of the composition is equal to or higher than 280° C.3. The piezoelectric material according to claim 1 , wherein a molar ratio of (the first component+the third component) to (the first component+the second component+the third component) is 0.1 to 0.9.4. The piezoelectric material according to claim 1 , wherein a molar ratio of the ...

PIEZOELECTRIC ACCELEROMETER

At least some of the example embodiments are methods including measuring motion of a body by deflecting a first cantilever portion of a sensing element, and deflecting a second cantilever portion of a sensing element, the second cantilever element of the sensing element disposed opposite the first cantilever element. A first voltage having a first polarity is created across electrical leads responsive to the deflecting of the cantilever portions opposite the direction of the first acceleration of the body. The sensing element is supported by way of a mounting plate medially disposed on the sensing element. 1. A method comprising: deflecting a first cantilever portion of a sensing element, the deflecting along a direction opposite a direction of a first acceleration of a body;', 'deflecting a second cantilever portion of a sensing element, the deflecting along a direction opposite the direction of first acceleration of the body, the second cantilever element of the sensing element disposed opposite the first cantilever element;', 'creating a first voltage having a first polarity, the first voltage created across electrical leads responsive to the deflecting of the cantilever portions opposite the direction of the first acceleration of the body;', a first arcuate curve portion;', 'a second arcuate curve portion disposed on opposite first arcuate curve portion;', 'a first chord connecting a first end of the first arcuate curve portion with a first end of the second arcuate curve portion; and', 'a second chord connecting a second end of the first arcuate curve portion with a second end of the second arcuate curve portion., 'wherein the sensing element is supported by way of a mounting plate medially disposed on said sensing element, the mounting plate defining a periphery comprising], 'measuring motion of a body by'}2. The method of wherein after creating the first voltage claim 1 , the measuring motion of a body further comprises:deflecting the first cantilever portion ...

Touch detection device used in water handling equipment, and faucet apparatus including the same

A touch detection device capable of operation by a light touch, and of preventing false operations even when used in water handling equipment includes a sensing portion for sensing contact by a target object; a vibration excitation element attached to this sensing portion, a drive circuit for exciting vibration in the sensing portion, and a contact determining circuit for determining whether a target object is contacting a sensing portion based on vibration of the sensing portion after stopping the application of an AC voltage to the vibration excitation element by this drive circuit.

ULTRASONIC SENSOR

An ultrasonic sensor including a case having a bottom portion, and a piezoelectric element that is bonded to an inner surface of the bottom portion and performs bending vibration together with the bottom portion. The piezoelectric element includes a piezoelectric layer having a transmission region and a reception region, a common electrode, a transmission electrode opposing the common electrode with the transmission region interposed therebetween, and a reception electrode opposing the common electrode with the reception region interposed therebetween. The transmission region and the reception region are formed at positions adjacent to each other. 1. An ultrasonic sensor comprising:a case having a bottom portion; and a piezoelectric layer having a transmission region and a reception region;', 'a common electrode having at least one portion facing or disposed within both the transmission region and reception region of the piezoelectric layer;', 'a transmission electrode opposed to the common electrode with the transmission region interposed therebetween; and', 'a reception electrode opposed to the common electrode with the reception region interposed therebetween, wherein an impedance between the transmission electrode and the common electrode is lower than an impedance between the reception electrode and the common electrode., 'a piezoelectric element bonded to an inner surface of the bottom portion, the piezoelectric element including2. The ultrasonic sensor according to claim 1 , wherein the reception electrode comprises at least one disk and the transmission electrode comprises a plurality of intermediate portions disposed in the transmission region of the piezoelectric layer claim 1 , wherein the number of intermediate portions is greater than the number of the at least one disk.3. The ultrasonic sensor according to claim 1 , wherein the transmission region and the reception region are arranged at positions adjacent to each other in a direction perpendicular to ...

DEVICE AND METHOD FOR MEASURING PHYSICAL PARAMETERS USING SAW SENSORS

A SAW mode sensor for sensing parameters such as temperature, pressure, and strain. The sensor is made of a piezoelectric crystal cut at selected angles, with an attached electrode layer with a signal receiver and signal transmitter. The signal receiver initiates a wave in the substrate which propagates in the substrate and the speed of the wave and amplitude of the wave is interpreted as the parameter being sensed. 1. A wireless sensor for variable temperature environments , comprising:a piezoelectric crystal substrate of the LGX family of crystals with a SAW propagation path defined by selected Euler angles between an uncut LGX material and a cut surface of LGX material;a SAW sensor;a power source for powering a SAW input transducer, wherein said input transducer is configured for receiving an RF interrogating signal; andan antenna attached to said input transducer for receiving an RF interrogating signal from a signal processing system, with said sensor powered by said RF signal;with said RF signal being converted to a SAW electromechanical signal via the input transducer for propagating within the crystal substratewith said propagating signal being encoded to include information regarding states of sensor measurandswith said encoded signal being redetected by input transducer creating an encoded RF signalwith said encoded RF signal being retransmitted by said antenna to said signal processing system;with said crystal being cut to selected Euler angles φ, θ, and ψ defining a selected crystal orientation and propagating direction.2. The sensor of claim one wherein said SAW sensor further comprises:a periodic interdigital transducer of several wavelength periodicities in width, said interdigital transducer, affixed to said piezoelectric crystal as a thin layer.3. The sensor of claim one wherein said SAW sensor further comprises:an input transducer;a reflector located on both sides of said input transducer oriented to reflect SAW along the propagation direction.4. A ...

Transducer Structure, Transducer Comprising Such Transducer Structure, and Sensor Comprising said Transducer

A transducer structure for converting a deformation along an axis into a corresponding deformation on a plane orthogonal to the axis itself, including: two end plates facing each other and aligned along a common reference axis (X); connection members projecting radially from each end plate according to respective different directions; lateral bars connecting the end plates to one another through two connection members. The connection members are deformable within respective deformation planes to allow relative movements between the end plates and the lateral bars such as to convert an axial movement of mutual approach between the two end plates into a corresponding radial movement of the lateral bars away from the reference axis (X), and vice-versa. 1. A transducer structure for converting a deformation along an axis into a corresponding deformation on a plane orthogonal to said axis , comprising:two end plates facing each other and aligned along a common reference axis (X);{'b': 2', '3, 'a plurality of connection members projecting radially from each end plate (, ) according to respective mutually different directions;'}a plurality of lateral bars, each connecting said end plates to one another through two respective of said connection members;wherein said connection members are deformable within respective deformation planes to allow relative movements between said end plates and said lateral bars such as to convert an axial movement of mutual approach between said two end plates into a corresponding radial movement of said lateral bars away from said reference axis (X), and vice-versa.2. The transducer structure according to claim 1 , wherein each connection member comprises one or two hinge elements claim 1 , each hinge element being configured to allow mutual rotation between two mutually adjacent parts within said connection member according to a corresponding hinge axis orthogonal to the respective deformation plane.3. The transducer structure according to ...

Piezoelectric transducers

A piezoelectric transducer comprises a piezoelectric element operable to transduce mechanical movement of the piezoelectric element to an electrical signal and to transduce an electrical signal in the piezoelectric element to a mechanical movement thereof, wherein the piezoelectric transducer is operable to transduce above a temperature of 200° C.

Vibration sensor

A test object includes a sensor housing for vibrating together with a test object in synchronism with vibration of the test object; a piezoelectric substrate for vibrating together with the sensor housing in synchronism with vibration of the sensor housing, where a first interdigital electrode, a first terminal, a second interdigital electrode, and a second terminal are disposed on a first surface of the piezoelectric substrate, and the piezoelectric substrate is disposed inside the sensor housing to be fixed to the sensor housing; an amplifier for receiving a signal output from the second terminal as an input signal, amplifying the received input signal, and transmitting the input signal after the amplification to the first terminal as an output signal; a deformable layer being elastic and having a first surface adhered to a second surface of the piezoelectric substrate; and a heavy object having a first surface adhered to a second surface of the deformable layer.

ATTACHABLE SENSING POD COMPRISING A PIEZOELECTRIC UNIT

A sensor pod assembly comprising a gel pad, a gel pad cap, a piezoelectric sensor, a base plate, a base plate support, a wiring harness, a battery, a noise attenuating backing, and a charging component; said gel pad comprising a top and bottom, said bottom having a flat bottom and a concave recess; said flat bottom acoustically contacting said piezoelectric sensor; said piezoelectric sensor secured to a first side of said base plate support, and a second side of said base plate support secured to said base plate, a wiring harness and a battery connected to said base plate, and a charging component having exposed annular rings on the exterior side of said sensor pod assembly; a noise attenuating backing compressing the charging component against the base plate; and a gel pad cap having an outer face and an inner face, said inner face in contact with said base plate support. 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. A sensor pod assembly comprising:a base plate having a top side and a bottom side, a piezoelectric unit, a battery, a noise attenuating backing, a wireless charging coil, a sound attenuating cap, and a sensor pad, said base plate comprising electronic circuitry connected to said battery, said piezoelectric unit and to said wireless charging coil, said piezoelectric unit attached to said top side of said base plate and said wireless charging coil and said battery attached to said bottom side; said sound attenuating cap having a ring shape, having an inner and outer side wall and a circular opening providing access to the piezoelectric unit from the top side; said noise attenuating backing engaged to the bottom side of the base plate; and said sensor pad positioned within the circular opening of said sound attenuating cap and in contact with at least a portion of the piezoelectric unit.9. The sensor pod assembly of further comprising a base plate support having a top and a bottom claim 8 , said base plate ...

Piezoelectric ultrasonic detector

Embodiments relate generally to an ultrasonic detector, and methods of making the ultrasonic detector. The ultrasonic detector may comprise a piezoelectric element operable to convert the pressure of sound waves from mechanical energy into electric signal; a protective cover; a hot melt adhesive; one or more layers of solder; one or more perforated metal electrodes comprising openings filled with the solder; and one or more support elements. The ultrasonic detector may also comprise one or more casing elements operable to enclose and house the other elements of the ultrasonic detector; a printed circuit board (PCB) operable to receive ultrasonic data from the piezoelectric element and electrodes, wherein the electrodes connect to, or contact, the PCB; and an insulator located in proximity to the electrodes, and operable to prevent shorting between the metal electrodes and the metal casing elements.

ENERGY-HARVESTING SENSOR SYSTEM AND METHOD THEREFOR

A sensor network that is easy to deploy and substantially maintenance-free is disclosed. Sensor networks in accordance with the present invention include a base station and at least one sensor node that is operative for monitoring the occupancy of an area and wirelessly communicating information to the base station. The sensor node includes an energy harvester for converting ambient energy into electrical energy and an energy manager that enables self-powering of the sensor node using only the electrical energy derived from the ambient energy. The energy manager also includes a cold-start module that enables initiation of sensor-node operation even in the absence of any stored energy onboard the sensor node. 1. A sensor system comprising a sensor node , wherein the sensor node includes:a sensor module including a first sensor for providing a first signal that is based on a first measurand;a harvester module including a first energy harvester that is operative for converting a first ambient energy into a first electrical signal;an energy storage system; andan energy manager that includes a converter that converts the first electrical signal into a second electrical signal, wherein the energy manager has multiple operational modes for charging the energy storage system, the multiple operational modes including a high-efficiency charging mode and a high-speed charging mode, and wherein the energy manager operates in the high-speed charging mode when the magnitude of the second electrical signal exceeds an input threshold.2. The sensor system of wherein the sensor node further comprises:a communications system, the communications system being operative for communicating with a base station.3. The sensor system of wherein the communications system is a wireless communications system.4. The sensor system of further comprising the base station claim 2 , wherein the base station is operative for providing a control signal that is based on a second signal received from the ...

Detector and Methods of Detecting

An ultrasonic detector suitable for mounting in a position for surveying an area for a source of airborne ultrasound, which detector comprises a sensor for detecting an ultrasonic sound signal, characterised by a transducer configured to produce a broadband ultrasonic sound signal for reception by said sensor enabling said ultrasonic detector to perform a self-test. 1. An ultrasonic detector suitable for mounting in a position for surveying an area for a source of airborne ultrasound , which detector comprises:a plurality of sensors for detecting an ultrasonic sound signal, each sensor of said plurality of sensors comprising a sensing face;a housing comprising a convex external surface;wherein said plurality of sensors is arranged on said convex external surface so that each sensing face is oriented in a direction different to every other sensing face.2. The ultrasonic detector of claim 1 , wherein said housing comprises an electronics enclosure comprising and upper half and a lower half claim 1 , and wherein said plurality of transducers is disposed around said lower half.3. The ultrasonic detector of claim 2 , wherein said housing has a longitudinal axis claim 2 , and each sensor of said plurality of sensors is positioned at 90° centres around the circumference of said lower half of the sensor housing and at 45° from the longitudinal axis of the detector.4. The ultrasonic detector of claim 1 , wherein each sensor of said plurality of sensors has a detection angle claim 1 , and wherein said plurality of sensors is arranged so that said detection angles overlap.5. The ultrasonic detector of claim 4 , wherein a pair of said plurality of sensors is arranged opposite one another on said convex external surface and the detection angle (AR) of each of said pair of sensors is greater than an angle (AA) defined between the two directions of orientation of said pair of sensors respectively.6. The ultrasonic detector of claim 1 , wherein each sensor of said plurality of ...

Wireless piezoelectric accelerometer and system

Wireless piezoelectric accelerometers and systems are provided. A wireless piezoelectric accelerometer may comprise a piezoelectric sensing element configured to sense mechanical acceleration and produce an electrical charge signal in response of the sensed mechanical acceleration, a signal processing module (SPM) configured to convert the electrical charge signal into a voltage signal, and process and digitize the voltage signal, and a wireless module configured to modulate and transmit the digitized voltage signal as wireless signals. The piezoelectric sensing element, the SPM and the wireless module are packaged in a casing. The casing comprises a metallic shielding chamber configured to enclose the piezoelectric sensing element. The casing further comprises a non-metallic portion located in relative to the wireless module to allow transmission of the wireless signals. Corresponding wireless piezoelectric accelerometer systems are also provided.

SEATING SENSOR, SEAT, AND WAVEFORM ANALYSIS APPARATUS

In an exemplary embodiment, a seating sensor includes a sensor module provided with a piezoelectric element and attached to a seat via a vibration transmission plate When a user is seated on the seat pulse wave vibrations due to blood flow of the user are transmitted through the seat to its reverse face side, and then transmitted to the vibration transmission plate and further transmitted, via a vibration ring to the piezoelectric element in the sensor module whereupon a seating of the user on the seat and/or the user's biological information are/is detected. The vibration transmission plate allows the pulse wave vibrations from the user to be transmitted to the sensor module even when the user does not sit on the seat directly above the seating sensor 1. A seating sensor structure that detects biological vibrations from a user seated on a seat , comprising: a substrate;', 'a piezoelectric element that measures vibrations of the substrate to obtain vibration waveforms of the vibrations; and', 'a vibration introducer provided on the substrate, which contacts a target object and transmits vibrations of the target object to the substrate; and, 'a sensor module comprisinga vibration transmission plate provided, as the target object, on a surface of the seat, wherein the sensor module is fixed to the seat via the vibration transmission plate in a manner that the vibration introducer contacts the vibration transmission plate, wherein the vibration transmission plate has a modulus of elasticity which is higher than a modulus of elasticity of the surface of the seat and a modulus of elasticity of the vibration introducer.2. The seating sensor according to claim 1 , wherein the vibration introducer is conductive.3. The seating sensor according to claim 1 , wherein the vibration introducer is a conductive ring and a space inside the ring is filled with a resin.4. The seating sensor according to claim 1 , wherein the vibration transmission plate makes surface contact with the ...

ULTRASONIC MEASUREMENT DEVICE, HEAD UNIT, PROBE, AND DIAGNOSTIC DEVICE

An ultrasonic measurement device includes an ultrasonic transducer device, a flexible substrate and an integrated circuit device. The ultrasonic transducer device has a substrate, an ultrasonic element array, a plurality of signal electrode lines formed on the substrate and electrically connected to the ultrasonic element array, and a plurality of signal terminals arranged on the substrate. In the flexible substrate, a plurality of signal lines are formed along a first direction. Each of the signal electrode lines has an electrode layer in which at least one signal electrode among some of the ultrasonic elements extends on the substrate. A long side direction of the integrated circuit device extends along a second direction which intersects with the first direction, and each of terminals of the integrated circuit device is connected to a corresponding one of the signal lines of the flexible substrate. 1. An ultrasonic measurement device comprising: a substrate,', 'an ultrasonic element array having a plurality of ultrasonic elements arranged on the substrate,', 'a plurality of signal electrode lines formed on the substrate and electrically connected to the ultrasonic element array, and', 'a plurality of signal terminals arranged on the substrate;, 'an ultrasonic transducer device having'}a flexible substrate in which a plurality of signal lines are formed along a first direction; andan integrated circuit device having a plurality of terminals for outputting a transmission signal to the ultrasonic element array, whereineach of the signal electrode lines has an electrode layer in which at least one signal electrode among some of the ultrasonic elements extends on the substrate,one of the signal terminals is connected to one end of a corresponding one of the signal electrode lines,one of the signal lines of the flexible substrate is connected to a corresponding one of the signal terminals, andthe integrated circuit device is mounted on the flexible substrate such that ...

ULTRASONIC MEASUREMENT DEVICE, HEAD UNIT, PROBE, AND DIAGNOSTIC DEVICE

An ultrasonic measurement device includes an ultrasonic transducer device, a flexible substrate, and an integrated circuit device. The ultrasonic transducer device has an ultrasonic element array, and a plurality of signal terminals. In the flexible substrate, a plurality of signal lines are formed along a first direction. The integrated circuit device is mounted on the flexible substrate such that a long side direction is along a second direction. The integrated circuit device has a plurality of terminals arranged along the second direction, and a transmission circuit provided for each of the terminals to output a transmission signal. Each of the terminals of the integrated circuit device is connected to a corresponding one of the signal lines of the flexible substrate. A plurality of the transmission circuits are arranged along the second direction in a state in which the integrated circuit device is mounted on the flexible substrate. 1. An ultrasonic measurement device comprising:an ultrasonic transducer device having an ultrasonic element array, and a plurality of signal terminals which are electrically connected to the ultrasonic element array;a flexible substrate in which a plurality of signal lines are formed along a first direction; andan integrated circuit device mounted on the flexible substrate such that a long side direction is along a second direction which intersects with the first direction, whereinone of the signal lines of the flexible substrate is connected to a corresponding one of the signal terminals,the integrated circuit device has a plurality of terminals arranged along the second direction in a state in which the integrated circuit device is mounted on the flexible substrate, and a transmission circuit provided for each of the terminals to output a transmission signal,each of the terminals of the integrated circuit device is connected to a corresponding one of the signal lines of the flexible substrate, anda plurality of the transmission ...

PRINTED CIRCUIT BOARD ON WHICH VIBRATION COMPONENT FOR GENERATING VIBRATION IS MOUNTED

There is provided a printed circuit board, on which a piezoelectric element for generating vibration is mounted, is fixed to a pedestal. Two slits are formed on a straight line that connects first position where the piezoelectric element is mounted on the printed circuit board and a second position where the printed circuit board is in contact with the pedestal. 1. A printed circuit board , on which a vibration component for generating vibration is mounted , is fixed to a pedestal , the printed circuit board comprising:first slit formed on a straight line that connects a first position where the vibration component is mounted on the printed circuit board and a second position where the printed circuit board is in contact with the pedestal.2. The printed circuit board according to claim 1 , wherein a length of the first slit in a lengthwise direction is longer than a length of the vibration component in the lengthwise direction.3. The printed circuit board according to claim 1 , wherein a lengthwise direction of the first slit is a direction orthogonal to a lengthwise direction of the printed circuit board.4. The printed circuit board according to claim 1 , further comprising a second slit formed on a line that connects the first position where the vibration component is mounted on the printed circuit board and the second position where the printed circuit board is in contact with the pedestal.5. The printed circuit board according to claim 4 , wherein a length of the second slit in a lengthwise direction is longer than a length of the vibration component in the lengthwise direction.6. The printed circuit board according to claim 4 , wherein a lengthwise direction of the second slit is a direction orthogonal to a lengthwise direction of the printed circuit board.7. The printed circuit board according to claim 4 , wherein the first slit and the second slit are respectively formed on first and second sides of the vibration component.8. The printed circuit board ...

MEMBRANE HYDROPHONE FOR HIGH FREQUENCY ULTRASOUND AND METHOD OF MANUFACTURE

A hydrophone used for measuring acoustic energy from a high frequency ultrasound transducer, or a method of manufacturing the membrane hydrophone. The membrane assembly is supported by the frame and comprises a piezoelectric. The hydrophone also includes an electrode pattern formed within the piezoelectric to define an active area. In addition, the hydrophone includes a built in-situ coaxial layer connected to the active area. 1. A hydrophone for measuring acoustic energy from a high frequency ultrasound transducer , comprising:a frame;a membrane assembly supported by the frame and comprising a piezoelectric;an electrode pattern formed within the piezoelectric to define an active area; anda built in-situ coaxial layer connected to the active area.2. The hydrophone of claim 1 , further comprising:insulating layer connected to the in-situ coaxial layer.3. The hydrophone of claim 1 , further comprising:a membrane film attached to the frame, wherein the built in-situ coaxial layer is placed on the membrane frame.4. The hydrophone of claim 3 , further comprising:plurality of vias that electrically connect the membrane film and the built in-situ coaxial layer.5. The hydrophone of claim 3 , wherein the membrane film comprises an acoustic aperture.6. The hydrophone of claim 2 , wherein the insulating layer covers at least a part of a ground trace on the built in-situ coaxial layer.7. The hydrophone of claim 1 , further comprising:a member placed on the piezoelectric, wherein the member includes an aperture that exposes the piezoelectric.8. The hydrophone of claim 7 , wherein the active area is located within the aperture of the member.9. The hydrophone of claim 7 , wherein at least one of the member or the built in-situ coaxial layer are sputtered.10. The membrane hydrophone of claim 1 , wherein the hydrophone comprises a water-proof casing.11. A method of making a hydrophone for measuring acoustic energy from a high frequency ultrasound transducer claim 1 , comprising: ...

Condition monitoring system, condition monitoring method, condition monitoring program, and storage medium

The condition monitoring system includes an acquisition unit and a generation unit. The acquisition unit acquires waveform data from a measuring device to measure an electrical signal that is either output or input of a converter. The waveform data represents a waveform of the electrical signal. The generation unit generates, based on the waveform data, analysis data to monitor the condition concerning the converter. The generation unit obtains, by frequency analysis, a plurality of combinations, each including a value of a frequency and a value of a feature quantity that is either intensity or phase, based on the waveform data when a value of the drive frequency varies and thereby generate the analysis data having at least three variables including the frequency, the feature quantity, and the drive frequency.

Piezo stack drive of a vibration limit switch with front-mounted fastening mechanism

An assembly arrangement for connecting a membrane of a vibration sensor with a drive unit such that vibrations of the drive unit are transmitted to the membrane and vibrations of the membrane are transferred to the drive unit, wherein the assembly arrangement is formed as a cylindrical sleeve, having on one end a fastening section for indirectly or directly fastening to the membrane or an element connected with the membrane, and an insertion opening for the drive unit on the other end.

Two-Wire Electronics Interface Sensor With Integrated Mechanical Transducing And Temperature Monitoring Capability

A sensor with integrated mechanical transducing and temperature monitoring capability is provided. The sensor includes housing containing a transducer, a temperature sensor with associated bias, a summing circuit, and a two-wire cable connector. The transducer is operable to output a dynamic transducer waveform that corresponds to dynamic mechanical perturbations sensed by the transducer. The temperature sensor is operable to output a quasi-static temperature waveform that corresponds to temperatures sensed by the temperature sensor. The summing circuit is operable to combine the transducer waveform and the temperature waveform into a composite modulated voltage bias output signal or a modulated current bias output signal. The two-wire cable connector is accessible on an outside of the housing and is connectable to a two wire cable that delivers power to the sensor from a power source and delivers the composite output signal from the sensor to a remote data acquisition circuit. 1. A sensor with integrated mechanical transducing and temperature monitoring capability , comprising:a housing;a transducer in said housing operable to output a dynamic transducer waveform that corresponds to dynamic mechanical perturbations sensed by said transducer;a temperature sensor in said housing operable to output a quasi-static temperature waveform that corresponds to temperatures sensed by said temperature sensor;a summing circuit in said housing operable to combine said transducer waveform and said temperature waveform into a composite bias-modulating output signal; anda two-wire cable connector accessible on an outside of said housing that is connectable to a two wire cable that delivers power to said sensor from a remote power source and delivers said composite output signal from said sensor to a remote data acquisition circuit.2. The sensor of wherein said transducer comprises a piezoelectric transducer.3. The sensor of claim 2 , wherein said summing circuit comprises a summing ...

SYSTEMS AND METHODS FOR A QUANTUM-ANALOGUE COMPUTER

Disclosed are systems and methods for a quantum-analogue computing bit array consisting of a single qubit analogue, a serial two qubit analogue coupling, or parallel N qubit analogues. The quantum-analogue computing bit array comprises an elastic media having photo-elastic and photo-expansion effects, the adjustment of which allows a manipulation of one or more structural degrees of freedom within the elastic media and one or more temporal degrees of freedom within the elastic media. At least one analogue qubit is defined by one or more elastic waves within the elastic media. The quantum-analogue computing bit array further comprises a modulated light source oriented to illuminate the elastic media with a laser radiation to achieve a non-separable multi-phonon superposition of states within the elastic media. 1. A quantum-analogue computing bit array comprising:an elastic media having photo-elastic and photo-expansion effects that allow a manipulation of one or more of structural degrees of freedom within the elastic media;at least one analogue qubit defined by one or more elastic waves within the elastic media; anda modulated light source oriented to illuminate the elastic media with a laser radiation to achieve a non-separable multi-phonon superposition of states within the elastic media.2. The quantum-analogue computing bit array of claim 1 , further comprising:a first piezoelectric transducer at a first distal end of the elastic media; anda second piezoelectric transducer at a second distal end of the elastic media;wherein the first and second piezoelectric transducers are configured to produce and detect guided longitudinal elastic waves within the elastic media.3. The quantum-analogue computing bit array of claim 1 , comprising:three or more analogue qubits defined by a corresponding three or more elastic media, wherein the three or more elastic media are embedded in a matrix material such that the evanescent waves of adjacent ones of the three or more elastic ...

Monitoring of vehicle window vibrations for voice-command recognition

Method and apparatus are disclosed for monitoring of vehicle window vibrations for voice-command recognition. An example vehicle includes a window, an outer layer, a vibration sensor coupled to the window to detect audio vibrations, an audio actuator coupled to the outer layer to vibrate the outer layer, and a controller. The controller is to detect a voice command from a user via the vibration sensor, identify an audio response based upon the voice command, and emit the audio response to the user via the audio actuator.

VIBRATION SENSOR PACKAGE

A sensor package for sensing vibration is described. The sensor package includes a carrier and a piezoelectric module coupled to the carrier. A wireless vibration sensor is further coupled to the carrier at a distance from the piezoelectric module. The sensor package further includes one or more conductive paths coupling the piezoelectric module to the wireless vibration sensor. The sensor package may be disposed on a bearing housing of a rail vehicle. The sensor package may also be utilized in marine, land and aviation applications. 1. A sensor package for sensing vibration , comprising:a carrier;a piezoelectric module coupled to the carrier;a wireless vibration sensor coupled to the carrier at a distance from the piezoelectric module; andone or more conductive paths coupling the piezoelectric module to the wireless vibration sensor.2. The sensor package of claim 1 , wherein the piezoelectric module is mechanically coupled to the carrier via one or more connectors.3. The sensor package of claim 2 , wherein the one or more connectors are screws.4. The sensor package of claim 1 , wherein the piezoelectric module is coupled to the carrier via a potting material.5. The sensor package of claim 4 , wherein the potting material is a thermosetting plastic or a silicone gel.6. The sensor package of claim 1 , wherein the carrier is curved to define a concave and a convex side of the carrier claim 1 , the sensor and the piezoelectric module being disposed on the convex side of the carrier.7. The sensor package of claim 1 , wherein the sensor package is disposed on a rail vehicle.8. A rail vehicle claim 1 , comprising:a frame; one or more tool holder assemblies for coupling the one or more tools to the workhead;', 'one or more connector rods coupled to the one or more tool holder assemblies;', 'a drive shaft extending through the connector rods;', 'one or more bearings disposed between the one or more connector rods and the drive shaft; and', 'one or more sensor packages ...

MAGNETIC RESONANCE DEVICE, MAGNETIC RESONANCE SYSTEM AND ASSOCIATED OPERATING METHOD

A magnetic resonance device comprising a gradient coil assembly having gradient coils is described. The gradient coils are supported by at least one cylindrical coil carrier for generating gradient fields. As part of the gradient coil assembly, at least one vibration sensor is provided for measuring vibrations of the gradient coil assembly at least in a radial direction of oscillation. 1. A magnetic resonance device , comprising: gradient coils configured to generate gradient fields;', 'at least one cylindrical coil body configured to support the gradient coils; and', 'at least one vibration sensor configured to measure vibrations of the gradient coil assembly at least in a radial direction of oscillation,, 'a gradient coil assembly includingwherein the at least one vibration sensor is disposed in, or on, the gradient coil assembly.2. The magnetic resonance device as claimed in claim 1 ,wherein at least one of the at least one vibration sensors includes a piezoelectric sensor and/or a Micro-Electro-Mechanical System (MEMS) accelerometer.3. The magnetic resonance device as claimed in claim 2 ,wherein the piezoelectric sensor and/or the MEMS accelerometer are disposed in the gradient coil assembly in a region of low dynamic magnetic fields.4. The magnetic resonance device as claimed in claim 1 ,wherein at least one of the at least one vibration sensors is encapsulated inside the at least one cylindrical coil body.5. The magnetic resonance device as claimed in claim 1 ,wherein at least one of the at least one vibration sensors is removably mounted on a surface of the gradient coil assembly via a mounting means.6. The magnetic resonance device as claimed in claim 5 ,wherein the at least one mounting means includes a mounting plate comprising at least one screw thread embedded on a surface of the at least one cylindrical coil body of the gradient coil assembly, andwherein at least one of the at least one vibration sensors is mounted to the mounting plate.7. The magnetic ...

SOUND INSPECTION METHOD AND INSPECTION APPARATUS FOR DISPLAY DEVICE INCLUDING SOUND GENERATOR

A sound inspection method of a display device and a sound inspection device including preparing a display device including a display panel and a sound generator disposed on a first surface of the display panel, placing a vibration sensor on a second surface opposite to the first surface of the display panel, vibrating the sound generator at a first reference frequency, vibrating the display panel, and then sensing a vibration of the vibration sensor that vibrates along with a vibration of the display panel; and determining whether a frequency of the vibration of the vibration sensor is included in a first threshold frequency region. 1. A sound inspection method of a display device , the sound inspection method comprising:preparing a display device including a display panel and a sound generator disposed on a first surface of the display panel;placing a vibration sensor on a second surface opposite to the first surface of the display panel;vibrating the sound generator at a first reference frequency, vibrating the display panel, and then sensing a vibration of the vibration sensor that vibrates along with a vibration of the display panel; anddetermining whether a frequency of the vibration of the vibration sensor is included in a first threshold frequency region.2. The sound inspection method of claim 1 , wherein:the first threshold frequency region includes a first representative threshold frequency, and determining that the display device is a good product when the frequency of the vibration of the vibration sensor is the same as the first representative threshold frequency; and', 'determining that the display device is a defective product when the frequency of the vibration of the vibration sensor is different from the first representative threshold frequency., 'the sound inspection method further comprises3. The sound inspection method of claim 2 , wherein the first representative threshold frequency is the same as the first reference frequency of the sound ...

MEMS AEROSOL IMPACTOR

Embodiments of the invention include aerosol impactors comprising one or more micromechanical resonators. Impactors according to embodiments of the invention can provide size classification and/or concentration of aerosol particulate. Aerosol impactors can use an air flow device, such as a pump, to create a constant flow of air. Nozzles of varying diameters are used to separate particulate of varying sizes and the particles that pass through strike a measuring device. MEMS resonators can be integrated into arrays to provide mass sensitivity in a small, lightweight and cost effective package, which will effectively allow for the measurement of the mass of every micro/nanoscale particle landing on the surface. 1. A particle impactor comprising:a housing;a nozzle disposed within the housing that includes an aperture to allow for the passage of air through the housing; anda microelectromechanical systems (MEMS) resonator positioned within the housing near the nozzle to capture particles within the air flowing through the housing, wherein the particles are within a predetermined size group, and wherein the MEMS resonator has a resonant frequency that shifts when a particle impacts a portion of the resonator.2. The particle impactor as in claim 1 , wherein the MEMS resonator is one of a plurality of MEMS resonators disposed on an impactor surface positioned below the nozzle.3. The particle impactor as in claim 1 , wherein the particle impactor is powered by a battery.4. The particle impactor as in claim 1 , wherein the MEMS resonator is less than or equal to 400 jim2 in area.5. The particle impactor as in claim 1 , wherein the MEMS resonator is less than or equal to 10 pm2 in area.6. The particle impactor as in claim 1 , wherein the particle impactor has a volume less than or equal to 40 cm3.7. The particle impactor as in claim 1 , wherein the particle impactor has a volume less than or equal to 10 cm3.8. The particle impactor as in claim 1 , wherein:the nozzle is one of ...

CONTACT ELEMENT AND METHOD FOR FORMING A CONTACT ELEMENT

The invention relates to a contact element (′), comprising a base body made of a strip material and/or sheet material, and at least one contact segment () which is connected to the base body and which is designed to make electric contact between the contact element () and a contact partner, in particular an electric and/or electronic component. The at least one contact segment () is embodied as a wire-like extension, which is formed integrally with the base body from the strip and/or sheet material. In addition, at least one end of the wire-like extension forms a transition region (), which adjoins the base. 13030130230. A contact element (′) , comprising a main body , which is composed of a strip material and/or sheet material , and at least one contact segment (. , .′) which is connected to the main body and is configured to electrically contact-connect the contact element (′) to a contact partner ,characterized in that{'b': 30', '2', '31, 'the at least one contact segment (.′) is a wire-like projection which is integrally formed with the main body, which is composed of the strip material and/or sheet material, and, by way of at least one end of the wire-like projection, forms a transition region () which adjoins the main body.'}230. The contact element (′) as claimed in claim 1 ,characterized in that{'b': 30', '2', '32, 'the wire-like projection (.′), by way of an other end, forms a contact foot (), which is free from the main body, of and which is configured for making contact with the contact partner.'}330. The contact element (′) as claimed in claim 2 ,characterized in that{'b': '32', 'the contact foot () is selectively coated with at least one layer which is composed of Ni, Au, Ag and/or Sn.'}430. The contact element (′) as claimed in claim 1 ,characterized in thatthe strip material and/or sheet material is formed from a bronze alloy.530. The contact element (′) as claimed in claim 1 ,characterized in that{'b': 30', '2, 'the contact segment (.′) is in the ...

FILTER SYSTEM INCLUDING RESONATOR

A filter system includes a first resonator having a first resonant frequency, and a second resonator having a second resonant frequency different from the first resonant frequency, and electrically connected to the first resonator. A first response characteristic of the first resonator and a second response characteristic of the second resonator with respect to a frequency include a first section in which a first phase of the first resonator is equal to a second phase of the second resonator, and a second section in which the first phase is different from the second phase by 180 degrees. A first electrode of the first resonator is reversely connected to a second electrode of the second resonator. 1. A filter system comprising:a first resonator group; anda second resonator group, a first resonator having a first resonant frequency, and', 'a second resonator having a second resonant frequency different from the first resonant frequency,, 'wherein the first resonator group comprises a third resonator having a third resonant frequency different from the first and second resonant frequencies, and', 'a fourth resonator having a fourth resonant frequency different from the first, second, and third resonant frequencies, and, 'wherein the second resonator group compriseswherein a first resonant frequency difference between the first resonator and the second resonator is less than a second resonant frequency difference between the first resonator and the third resonator.2. The filter system of claim 1 , wherein a third resonant frequency difference between the third resonator and the fourth resonator is less than a second resonant frequency difference between the first resonator and the third resonator3. The filter system of claim 1 , wherein a first response characteristic of the first resonator and a second response characteristic of the second resonator with respect to a frequency comprise a first section in which a first phase of the first resonator is equal to a second ...

DETECTION SENSOR AND DETECTION DEVICE INCLUDING THE SAME

A detection sensor according to an aspect of the invention includes a vibratable film constituted by a piezoelectric film, a case accommodating the vibratable film, and a circuit board. The vibratable film is configured to be irradiated with infrared rays and thereby generate first electric signals through a pyroelectric effect, and configured to be vibrated by sound waves and thereby generate second electric signals through a piezoelectric effect. The case includes a transmissive part. The transmissive part is configured to transmit at least infrared rays and disposed on one side in a first direction relative to the vibratable film to face the vibratable film. The first direction is a thickness direction of the vibratable film. The circuit board is fixed to the case and disposed on the other side in the first direction relative to the vibratable film. The circuit board has a sound hole to input therethrough sound waves.

MONITORING WINDSHIELD VIBRATIONS FOR VEHICLE COLLISION DETECTION

Method and apparatus are disclosed for monitoring windshield vibrations for vehicle collision detection. An example vehicle includes a windshield, a vibration sensor coupled to the windshield to detect window vibrations of the windshield, a first accelerometer to detect vehicle body vibrations of a vehicle body, and a restraint control module. The restraint control module is to detect an event based upon the window vibrations and determine whether the event is a collision event or a non-collision event responsive to comparing the window vibrations and the vehicle body vibrations. 1. A vehicle comprising:a window;a vibration sensor coupled to the window to detect window vibrations of the window;a first accelerometer to detect vehicle body vibrations of a vehicle body; and detect an event based upon the window vibrations; and', 'determine whether the event is a collision event or a non-collision event responsive to comparing the window vibrations and the vehicle body vibrations., 'a restraint control module to2. The vehicle of claim 1 , wherein the window vibrations detected by the vibration sensor correspond to sound waves caused by the event.3. The vehicle of claim 2 , further including a rain/wiper sensor that detects vibrations of the window caused by at least one of precipitation and windshield wipers to enable the window vibrations corresponding to the sound waves of the event to be identified.4. The vehicle of claim 1 , further including an airbag claim 1 , the restraint control module sends a signal to deploy the airbag responsive to determining that the event is the collision event and does not send the signal to deploy the airbag responsive to determining that the event is the non-collision event.5. The vehicle of claim 1 , wherein the non-collision event includes a blowout of a tire of a nearby vehicle.6. The vehicle of claim 1 , wherein the vibration sensor is a piezoelectric accelerometer.7. The vehicle of claim 1 , wherein the restraint control module ...

Water Meter and Systems

Some embodiments relate to a vibration sensor. The vibration sensor comprises: a sensor base to couple to a vibration source; a piezoelectric transducer coupled on a first side of the transducer to the sensor base; at least one conductor coupled to the piezoelectric transducer; and a seismic weight positioned on a second side of the piezoelectric transducer; wherein the sensor base, the piezoelectric transducer and the seismic weight are aligned along an axis and arranged so that relative movement between the sensor base and the seismic weight arising from the vibration source causes a current to be generated in the piezoelectric transducer and an output signal corresponding to the generated current is detectable on the at least one conductor. 1. A water meter , comprising:a flow tube defining a lumen to receive water through the lumen, wherein the flow tube is configured to be coupled to a water supply network;a housing coupled to the flow tube and containing a self-contained power source, at least one processor, memory and a wireless transceiver;a flow sensor positioned to measure liquid flow through the lumen and coupled to the at least one processor to provide flow measurement signals to the at least one processor; anda vibration sensor arranged to sense vibration in a material of the flow tube and coupled to the at least one processor to provide vibration measurement signals to the at least one processor, the vibration sensor comprising a piezoelectric transducer and is arranged to abut the flow tube without extending into the lumen;wherein the at least one processor is configured to process the flow measurement signals and the vibration measurements signals and to determine an upstream liquid leakage status based on at least the vibration measurement signals;wherein the at least one processor is configured to transmit the upstream liquid leakage status and flow measurement information to a remote server.2. The meter of claim 1 , wherein the at least one ...

Acoustic wave sensor

An acoustic wave sensor may include: a continuous membrane deflectable by acoustic waves to be detected, and a piezoelectric layer provided on the membrane and including a plurality of piezoelectric layer portions respectively equipped with at least two individual electric contact structures configured to electrically connect the respective piezoelectric layer portions. Electric contact structures associated with different piezoelectric layer portions may be separated from each other.

MEMBRANE HYDROPHONE FOR HIGH FREQUENCY ULTRASOUND AND METHOD OF MANUFACTURE

A membrane hydrophone for analyzing high frequency ultrasound transducers has a piezoelectric membrane with electrode patterns created on the surface of the membrane. In one embodiment, the electrode patterns are doubled on each side of the membrane except for an active area of the hydrophone. In one embodiment, the electrodes are formed by removing a conductive coating on the membrane with laser pulses. The laser is set to remove the conductive coating from the piezoelectric membrane from the same side of the membrane in order to accurately align the electrodes in the active area. In one embodiment, the active area of the hydrophone has an area in a range of 900-10,000 square microns. 1. A membrane hydrophone for measuring acoustic energy from a high frequency ultrasound transducer , comprising:a frame;a piezoelectric membrane having a first side and a second side that is supported by the frame and including a conductive material on both sides of the piezoelectric membrane; andfirst and second electrodes patterns formed within the conductive material that overlap each other on opposite sides of the piezoelectric membrane to define an active area of the hydrophone;wherein the first electrode pattern is created on both sides of the piezoelectric membrane and overlap each other except in the active area, andwherein the second electrode pattern is created on both sides of the piezoelectric membrane and overlap each other except in the active area.2. The membrane hydrophone of claim 1 , wherein the first electrode patterns on each side of the piezoelectric membrane are electrically coupled together.3. The membrane hydrophone of claim 2 , further comprising one or more conductive vias in the piezoelectric membrane that electrically couple the first electrode patterns on each side of the piezoelectric membrane.4. The membrane hydrophone of claim 1 , further comprising a buffer amplifier to amplify the signal produced by the active area of the hydrophone claim 1 , wherein ...

ULTRASONIC PROXIMITY SENSORS, AND RELATED SYSTEMS AND METHODS

An ultrasonic proximity sensor can determine one or more characteristics of a local environment. For example, the sensor can emit an ultrasonic signal into a local environment and can receive an ultrasonic signal from the local environment. From a measure of correlation between the emitted and the received signals, the sensor can classify the local environment. By way of example, such a sensor can assess whether an in-ear earphone is positioned in a user's ear. A media device in communication with the sensor can transmit an audio signal to the earphone for audio playback responsive to a determination by the sensor that the earphone is in the user's ear and can redirect the audio signal to another playback device responsive to a determination by the sensor that the earphone is not in the user's ear. Related and other aspects also are described. 1. An electronic device , comprising:a housing having an internal surface and an external surface; and emit a plurality of ultrasonic signals through at least a portion of the housing from the plurality of ultrasonic transducers,', 'detect a plurality of reflections of at least some of the emitted plurality of ultrasonic signals, and', 'determine a contact on the external surface based on the detected plurality of reflections., 'a plurality of ultrasonic transducers spaced apart along the internal surface of the housing, wherein the sensor is configured to, 'a sensor, comprising2. The electronic device of claim 1 , wherein the ultrasonic signals from each of the plurality of ultrasonic transducers define a corresponding sensitive region of the housing.3. The electronic device of claim 1 , wherein each ultrasonic transducer is configured to generate an electrical signal responsive to one or more of the plurality of reflections of the at least some of the emitted plurality of ultrasonic signals.4. The electronic device of claim 3 , wherein the sensor further comprises a processing unit configured to determine the contact on the ...

Ultrasonic sensor

A sensor includes a lower electrode layer facing a cavity, a piezoelectric layer located on the lower electrode layer, and an upper electrode layer located on the piezoelectric layer. The piezoelectric layer includes a first piezoelectric part and a second piezoelectric part. The first piezoelectric part includes a first material having piezoelectricity and at least partially overlays the cavity when viewed on a plane. The second piezoelectric part includes a second material having piezoelectricity and being different in at least one of a “g” constant and “d” constant from the first material and, when viewed on a plane, is located in a region different from an arrangement region of the first piezoelectric part and at least partially overlays the cavity.

Piezoelectric accelerometer

An accelerometer. At least some of the example embodiments include an accelerometer having a first piezoelectric element having a first polarization, the first piezoelectric element defining an upper surface and a second piezoelectric element having a second polarization, the second piezoelectric element defines a lower surface parallel to the upper surface of the first piezoelectric element; the first polarization being aligned with the second polarization. The accelerometer further includes a first mounting plate that defines a first aperture, the first and second piezoelectric elements extending through the first aperture such that the first mounting plate transects the first and second piezoelectric elements. The piezoelectric elements define a first cantilever portion on a first side of the first mounting plate, and the piezoelectric elements define a second cantilever portion on a second side of the first mounting plate opposite the first side.

PIEZOELECTRIC ACCELEROMETER

At least some of the example embodiments are methods including measuring motion of a body by deflecting a first cantilever portion of a sensing element, and deflecting a second cantilever portion of a sensing element, the second cantilever element of the sensing element disposed opposite the first cantilever element. A first voltage having a first polarity is created across electrical leads responsive to the deflecting of the cantilever portions opposite the direction of the first acceleration of the body. The sensing element is supported by way of a mounting plate medially disposed on the sensing element. 1. A streamer comprising:a cable;a hydrophone coupled to the cable, the hydrophone sensitive to acoustic pressure fluctuations; and a first piezoelectric element having a first polarization, the first piezoelectric element defines an upper surface;', 'a second piezoelectric element having a second polarization, the second piezoelectric element defines a lower surface parallel to the upper surface of the first piezoelectric element, and the first polarization aligned with the second polarization;', 'a first mounting plate that defines a first aperture;', 'the first and second piezoelectric elements extend through the first aperture such that the first mounting plate transects the first and second piezoelectric elements, the piezoelectric elements define a first cantilever portion on a first side of the first mounting plate, and the piezoelectric elements define a second cantilever portion on a second side of the first mounting plate opposite the first side., 'an accelerometer coupled to the cable, the accelerometer comprising2. The streamer of :wherein the upper surface of the first piezoelectric element defines a first plane; andwherein the lower surface of the second piezoelectric element defines a second plane parallel to the first plane.3. The streamer of wherein the first mounting plate defines a first surface that defines a third plane claim 2 , and wherein ...

MAGNETIC INSTALLATION BASE

A magnetic installation base provided by the present invention comprises: a base applicable to be connected with an acceleration sensor; and a magnet set installed on the base and having an adsorption surface formed at an end far away from the base. The magnet set comprises several magnets, and the ends of adjacent magnets forming the adsorption surface have opposite polarities. During use, the magnetic installation base is adsorbed onto the surface of a to-be-tested object, therefore, the appearance of the to-be-tested object does not need to be destroyed, moreover, since the ends of adjacent magnets forming the adsorption surface have opposite polarities, the adsorption surface is ensured to have sufficient magnetic lines, and the adsorption capacity is larger. 1. A magnetic installation base , comprising:a base, applicable to be connected with an acceleration sensor; anda magnet set, installed on the base and having an adsorption surface formed at an end far away from the base, wherein the magnet set comprises several magnets, and the ends of adjacent magnets forming the adsorption surface have opposite polarities.2. The magnetic installation base of claim 1 , whereinthe base is made of magnetic conductive materials, the base is internally molded with an installation chamber, and the magnet set is installed in the installation chamber via adsorption.3. The magnetic installation base of claim 1 , wherein a connecting hole which is applicable to be connected with the acceleration sensor is molded on the base.4. The magnetic installation base of claim 2 , wherein the installation chamber is of a cylindrical shape claim 2 , the magnet set comprises a circular magnet and a cylindrical magnet which is installed in the circular magnet claim 2 , and magnetic poles at a lower end of the circular magnet and of the cylindrical magnet have opposite polarities.5. The magnetic installation base of claim 4 , wherein a gap is formed between the circular magnet and the ...

ADAPTIVE ELECTROMECHANICAL SHUNT SYSTEM, RELATED ADAPTATION LAW CIRCUIT AND METHOD FOR CONTROLLING VIBRATIONS OF STRUCTURES

Disclosed herein is an adaptive system that converts vibration in mechanical structures into electrical energy using a transducer having piezoelectric properties. The electrical energy generated is then converted into heat loss in an electrical circuit comprising: an adaptive inductance that autonomously changes its value by comparing the phase difference of the vibration velocity and the current flowing through the shunt circuit; a resistance to convert electrical energy into heat loss; and a synthetic negative capacitance to enhance the vibration attenuation. 1. An adaptive electromechanical shunt system for controlling vibrations of a structure , comprising:a transducer with piezoelectric properties mechanically attached to a structure to transform mechanical vibration energy of the structure into electrical energy; andan element that dissipates electrical energy;wherein the adaptive electromechanical shunt system comprises means for autonomously controlling, in an analog manner, vibrations of a structure independently of the normal variations of mechanical and electrical properties of the shunt system components and of changes of the operating conditions.2. The adaptive electromechanical shunt system of claim 1 , wherein the means for autonomously controlling claim 1 , in an analog manner claim 1 , vibrations of a structure independently of the normal variations of mechanical and electrical properties of the shunt system components and of changes of operating conditions comprise:a transducer to sense the mechanical vibration of the structure;a variable inductance circuit, which changes its value controlled by a control voltage;a synthetic negative capacitance connected to the electromechanical component circuit to change the total equivalent capacitance and enhance the vibration attenuation of the structure; andan adaptation law circuit, which autonomously generates the control voltage in an analog manner based on the phase difference between an inductor voltage ...

REFLECTION MINIMIZATION FOR SENSOR

An electronic device includes a substrate layer having a front surface and a back surface opposite the front surface, a plurality of ultrasonic transducers formed on the front surface of the substrate layer, wherein the plurality of ultrasonic transducers generate backward waves during operation, the backward waves propagating through the substrate layer, and a plurality of substrate structures formed within the back surface of the substrate layer, the plurality of substrate structures configured to modify the backward waves during the operation. 1. An electronic device comprising:a substrate layer having a front surface and a back surface opposite the front surface; anda plurality of ultrasonic transducers formed on the front surface of the substrate layer, wherein the plurality of ultrasonic transducers generate backward waves during operation, the backward waves propagating through the substrate layer; anda plurality of substrate structures formed within the back surface of the substrate layer, the plurality of substrate structures configured to modify the backward waves during the operation.2. The electronic device of claim 1 , wherein the plurality of substrate structures comprises scattering structures configured to modify a direction of the backward waves during the operation.3. The electronic device of claim 2 , wherein the scattering structures are dimensioned to create destructive interference of the backward waves.4. The electronic device of claim 1 , wherein the plurality of substrate structures comprises absorption structures comprising acoustic absorption material to modify an amplitude of the backward waves during the operation.5. The electronic device of claim 1 , wherein the plurality of ultrasonic transducers are Piezoelectric Micromachined Ultrasonic Transducer (PMUT) devices.6. The electronic device of claim 5 , wherein a PMUT device of the plurality of ultrasonic transducers comprises:a support structure connected to the substrate layer; and a ...

TECHNIQUES FOR TRANSDUCTION AND STORAGE OF QUANTUM LEVEL SIGNALS

Embodiments described herein include systems and techniques for converting (i.e., transducing) a quantum-level (e.g., single photon) signal between the three wave forms (i.e., optical, acoustic, and microwave). A suspended crystalline structure is used at the nanometer scale to accomplish the desired behavior of the system as described in detail herein. Transducers that use a common acoustic intermediary transform optical signals to acoustic signals and vice versa as well as microwave signals to acoustic signals and vice versa. Other embodiments described herein include systems and techniques for storing a qubit in phonon memory having an extended coherence time. A suspended crystalline structure with specific geometric design is used at the nanometer scale to accomplish the desired behavior of the system. 1. A system for transducing and storing a qubit signal , comprising:a suspended crystalline transducer for converting the qubit signal between a microwave form and an acoustic form when the suspended crystalline transducer oscillates at a tuning frequency; anda suspended crystalline structure coupled to the suspended crystalline transducer, the suspended crystalline structure comprising a plurality of acoustic cavities chained together, wherein the acoustic cavities are of differing sizes to store the qubit signal in acoustic form when the suspended crystalline transducer oscillates at the tuning frequency.2. The system for transducing the qubit signal of claim 1 , further comprising:a plurality of suspended crystalline structures, disposed in a geometric design to isolate the qubit signal in acoustic form, surround the suspended crystalline transducer and the suspended crystalline structure.3. The system for transducing the qubit signal of claim 1 , wherein the suspended crystalline transducer comprises a piezoelectric material overlay of a second suspended crystalline structure.4. The system for transducing the qubit signal of claim 3 , wherein the piezoelectric ...

Seismic Sensor

A seismic survey apparatus includes a body having a longitudinal axis, a first end, a second end opposite the first end, and an inner cavity positioned between the first end and the second end. In addition, the seismic survey apparatus includes a proof mass moveably disposed in the inner cavity of the body. The proof mass is configured to move axially relative to the body. Further, the seismic survey apparatus includes a first sensor disposed in the inner cavity. The first sensor comprises a first piezoelectric element configured to detect the axial movement of the proof mass relative to the body. Still further, the seismic survey apparatus includes electronic circuitry coupled to the first piezoelectric element. The electronic circuitry is configured to receive and process an output of the first piezoelectric element. The proof mass comprises a power supply configured to provide electrical power to the electronic circuitry. 1. A seismic survey apparatus for detecting seismic waves passing through a subterranean formation , the seismic survey apparatus comprising:a body having a longitudinal axis, a first end, a second end opposite the first end, and an inner cavity positioned between the first end and the second end;a proof mass moveably disposed in the inner cavity of the body, wherein the proof mass is configured to move axially relative to the body;a first sensor disposed in the inner cavity, wherein the first sensor comprises a first piezoelectric element configured to detect the axial movement of the proof mass relative to the body;electronic circuitry coupled to the first piezoelectric element, wherein the electronic circuitry is configured to receive and process an output of the first piezoelectric element; andwherein the proof mass comprises a power supply configured to provide electrical power to the electronic circuitry.2. The apparatus of claim 1 , wherein the power supply comprises a battery.3. The apparatus of claim 1 , further comprising:a second ...

ESTIMATING MOTION OF WHEELED CARTS

Examples of systems and methods for locating movable objects such as carts (e.g., shopping carts) are disclosed. Such systems and methods can use dead reckoning techniques to estimate the current position of the movable object. Various techniques for improving accuracy of position estimates are disclosed, including compensation for various error sources involving the use of magnetometer and accelerometer, and using vibration analysis to derive wheel rotation rates. Also disclosed are various techniques to utilize characteristics of the operating environment in conjunction with or in lieu of dead reckoning techniques, including characteristic of environment such as ground texture, availability of signals from radio frequency (RF) transmitters including precision fix sources. Such systems and methods can be applied in both indoor and outdoor settings and in retail or warehouse settings. 1. A navigation system for a human-propelled cart , the navigation system comprising:a magnetometer configured to determine a heading of the human-propelled cart;a vibration sensor configured to measure vibration data of the human-propelled cart;a communication system configured to communicate with a wheel of the human-propelled cart, the wheel comprising a brake configured to inhibit rotation of the wheel in response to receipt of a locking signal; and estimate a speed of the human-propelled cart based at least in part on the vibration data from the vibration sensor; and', 'estimate a position of the human-propelled cart based at least in part on the estimated speed and the heading of the human-propelled cart., 'a hardware processor programmed to2. The navigation system of claim 1 , wherein to estimate the speed of the human-propelled cart based at least in part on vibration data from the vibration sensor claim 1 , the hardware processor is programmed to analyze a spectrum of the vibration data.3. The navigation system of claim 2 , wherein to analyze the spectrum of the vibration data ...

Device for Capturing Operating Data of a Tool, and System

A device is provided for capturing operating data of a tool, wherein the tool is powered by an electric motor or a combustion engine, and wherein the device is embodied separately from the tool and is able to be coupled to the tool. The device includes: an operating data sensor, which is configured to wirelessly capture operating data of the tool, an operating data memory, which is configured to store operating data captured by the operating data sensor; and a communication interface, which is configured to wirelessly transmit operating data stored in the operating data memory to a terminal device. 1. A device for capturing operating data of a tool , wherein the tool is powered by an electric motor or a combustion engine , the device comprising:a sensor, which is configured to wirelessly capture at least one measured variable, wherein the measured variable is dependent on an operating state of the tool;an evaluation unit coupled to the sensor, said evaluation unit being configured to evaluate the measured variable captured by the sensor in order to determine the operating data therefrom;an operating data memory, which is configured to store the operating data; anda communication interface, which is configured to wirelessly transmit operating data stored in the operating data memory to a terminal device,wherein the device is embodied separately from the tool and is couplable to the tool.2. The device according to claim 1 , whereinthe sensor is configured to capture the measured variable irrespective of whether the tool is powered by the electric motor or the combustion engine.3. The device according to claim 1 , whereinthe evaluation unit is configured to determine operating data in the form of an operating time of the tool, during which the electric motor or the combustion engine is active.4. The device according to claim 1 , wherein the sensor is an inductive sensor.5. The device according to claim 1 , wherein the sensor is an acoustic sensor.6. The device ...

SEMICONDUCTOR INTEGRATED CIRCUIT, AND SENSOR SYSTEM AND VEHICLE INCLUDING THE SAME

A semiconductor integrated circuit constituting a part of a sensor signal processing apparatus for processing sensor signal output from a sensor includes: a first terminal where one end of a vibrator externally attached to the semiconductor integrated circuit is connected and a second terminal where the other end of the vibrator is connected; and an oscillation circuit oscillating the vibrator connected via the first and second terminals, wherein the oscillator circuit intermittently oscillating the vibrator based on control signal, wherein a first period where the oscillation circuit oscillates the vibrator and a second period where the oscillation circuit does not oscillate the vibrator are alternately switched, wherein, during the first period, potentials of the first and second terminals are alternately switched complementarily to high level and low level, and wherein, during the second period, the potentials of the first terminal and the second terminal are fixed to the low level. 1. A semiconductor integrated circuit constituting a part of a sensor signal processing apparatus for processing a sensor signal output from a sensor , the circuit comprising:a first terminal to which one end of a vibrator externally attached to the semiconductor integrated circuit is connected;a second terminal to which the other end of the vibrator is connected; andan oscillation circuit configured to oscillate the vibrator connected via the first terminal and the second terminal,wherein the oscillator circuit is configured to intermittently oscillate the vibrator based on a control signal,wherein a first period during which the oscillation circuit oscillates the vibrator and a second period during which the oscillation circuit does not oscillate the vibrator are alternately switched,wherein, during the first period, potentials of the first terminal and the second terminal are alternately switched complementarily to a high level and a low level, andwherein, during the second period, ...

PIEZOELECTRIC SENSOR AND INSTRUMENT INCLUDING SUCH A SENSOR

Some embodiments are directed to a piezoelectric sensor, including a body with a central cavity; and a membrane extending over the cavity, which membrane is fastened to the body via its periphery and includes a carrier layer made of polymer and a sensitive layer made of piezoelectric polymer, the membrane being able to deform or vibrate. The sensitive layer is made of a material including a polymer filled with inorganic nanomaterials. Instrument including such a sensor. 1. A piezoelectric sensor comprising:a body with a central cavity;a membrane extending over the cavity;the membrane being attached to the body via its periphery and includes a carrier layer made of polymer and a sensitive layer made of piezoelectric polymer material; andthe membrane being capable of deforming or vibrating, wherein the sensitive layer is made of a material comprising a polymer filled with inorganic nanomaterials.2. The sensor as claimed in claim 1 , wherein the polymer of the sensitive layer is selected from the group comprising polyvinylidene fluoride (PVDF) claim 1 , vinylidene fluoride and trifluoroethylene copolymer P(VDF-TrFE) and polyamide-11.3. The sensor as claimed in claim 1 , wherein the nanomaterials are made of an inorganic material such as metals claim 1 , semiconductors or dielectrics.4. The sensor as claimed in claim 1 , wherein the carrier layer is made of a material selected from the group including polyimide (PI) and polyether ether ketone (PEEK).5. The sensor as claimed in claim 4 , wherein the thickness of the carrier layer is between 5 and 150 μm.6. The sensor as claimed in claim 1 , wherein the membrane is attached to the body by bonding.7. The sensor as claimed in claim 6 , wherein the membrane is attached to the body by the carrier layer.8. The sensor as claimed in claim 1 , wherein a first conductive layer is interposed between the carrier layer and the sensitive layer.9. The sensor as claimed in claim 1 , wherein a second conductive layer is deposited on a ...

APPARATUS AND METHOD FOR CHARACTERIZING ADHESIVE BONDING AND OSSEOINTEGRATION

An apparatus and method is provided for characterizing adhesive bonding using an acoustic wave MEMS sensor. The sensor can consist of a silicon substrate, a thin aluminium nitride film on top of the substrate and a thin gold film above the aluminium nitride layer. An adhesive layer is added on top of the sensor and the dispersion property of acoustic waves in the layered configuration can be utilized for bonding integrity characterization. A wave dispersion model is developed to study the effect of changing the interface stiffness on the wave dispersion profile and to investigate the sensitivity of different sensor configurations. The results of the model illustrate that the dispersion profile shifts in the direction of decreasing wave velocity as the interface stiffness decreases. 1. An acoustic wave sensor , comprising:a) a semiconductor substrate;b) a piezoelectric layer disposed on the substrate;c) a metallic layer disposed on the piezoelectric layer; andd) an input electrode and an output electrode disposed on the substrate, the electrodes disposed between the substrate and the piezoelectric layer.2. The sensor as set forth in claim 1 , wherein the substrate comprises a silicon substrate.3. The sensor as set forth in claim 1 , wherein the piezoelectric layer comprises an aluminum-nitride film.4. The sensor as set forth in claim 3 , wherein the aluminum-nitride film is configured to electrically excite acoustic waves.5. The sensor as set forth in claim 1 , wherein the metallic layer comprises a gold film.6. The sensor as set forth in claim 1 , wherein one or both of the electrodes comprises a slanted finger interdigital configuration.7. The sensor as set forth in claim 1 , further comprising an adhesive layer disposed on the metallic layer.8. The sensor as set forth in claim 8 , wherein the adhesive layer is configured to adhere to a bone.9. An apparatus for characterizing adhesive bonding claim 8 , the apparatus comprising an acoustic wave sensor claim 8 , the ...

VIBRATION SENSOR FOR FLUID LEAK DETECTION

Some embodiments relate to a vibration sensor. The vibration sensor comprises: a sensor base to couple to a vibration source; a piezoelectric transducer coupled on a first side of the transducer to the sensor base; at least one conductor coupled to the piezoelectric transducer; and a seismic weight positioned on a second side of the piezoelectric transducer; wherein the sensor base, the piezoelectric transducer and the seismic weight are aligned along an axis and arranged so that relative movement between the sensor base and the seismic weight arising from the vibration source causes a current to be generated in the piezoelectric transducer and an output signal corresponding to the generated current is detectable on the at least one conductor. 1. A vibration sensor , comprising:a sensor base to couple to a vibration source;a piezoelectric transducer coupled on a first side of the transducer to the sensor base;at least one conductor coupled to the piezoelectric transducer; anda seismic weight positioned on a second side of the piezoelectric transducer;wherein the sensor base, the piezoelectric transducer and the seismic weight are aligned along an axis and arranged so that relative movement between the sensor base and the seismic weight arising from the vibration source causes a current to be generated in the piezoelectric transducer and an output signal corresponding to the generated current is detectable on the at least one conductor.2. The sensor of claim 1 , further comprising a compression component arranged to bias the seismic weight toward the sensor base.3. The sensor of claim 2 , wherein the compression component comprises a spring.4. The sensor of claim 3 , wherein the spring comprises a coil spring claim 3 , wave spring or leaf spring.5. The sensor of or claim 3 , wherein one end of the spring is coupled to the sensor base and an opposite end of the spring is coupled to the seismic weight.6. The sensor of or claim 3 , wherein the spring is disposed on a ...

PIEZOELECTRIC MATERIAL TEST PROBE AND METHOD

This disclosure provides systems, methods and apparatus for a test probe for characterizing piezoelectric material. In one aspect, a test probe may include a conductive tip configured to apply force to the piezoelectric material and provide a charge signal representing charge generated by the piezoelectric material as the piezoelectric material experiences the force. A force sensor within the test probe may generate a force signal representing the force being applied. A piezoelectric coefficient dmay be determined from the charge signal and the force signal. 1. A test probe for use in characterizing piezoelectric material , the test probe comprising:a conductive tip configured to apply force to the piezoelectric material when the test probe touches an assemblage including the piezoelectric material, the conductive tip also configured to provide a charge signal representing charge generated in response to the force being applied to the piezoelectric material; anda force sensor configured to provide a force signal representing the force being applied to the piezoelectric material.2. The test probe of claim 1 , wherein the force sensor is mechanically coupled to the conductive tip.3. The test probe of further comprising:an insulator component mechanically coupling the force sensor to the conductive tip.4. The test probe of claim 1 , wherein the force sensor is configured to provide the force signal as the force is applied to the piezoelectric material.5. The test probe of further comprising:a driver component configured to receive a drive signal and vibrate the conductive tip in response to the drive signal.6. The test probe of claim 1 , wherein the charge signal and the force signal are generated using a single side of the piezoelectric material.7. The test probe of further comprising:a test probe tip in which the conductive tip and the force sensor are disposed.8. The test probe of further comprising:a protective coating disposed upon the conductive tip and ...

METHOD FOR DETECTING THE WEAR OF WEARING TIRES OF A VEHICLE AND VEHICLE

In a method for detecting the wear of wearing tires of a vehicle, wherein the tires consist of an elastic material, signals are emitted by signal generators introduced into the tires, wherein only signal generators located on the tire surface emit a signal. The emitted signal is received by a sensor arranged in the vehicle, and information processed from the received signal is made available to the driver of the vehicle. Enhanced, in particular automatic measurement of the tire tread is enabled by means of such a method. 1. A vehicle , comprising:wearing tires made of an elastic material; anda wear measuring unit for the tires, the wear measuring unit comprising:a plurality of signal generators are integrated in at least one joined signal element arranged in a tread of the tire, wherein the signal element generates a structure-borne sound signal when the tires are worn-off and when the signal element comes into contact with the street the signal element generates a structure-borne sound signal, wherein the signal element is smaller than the tread of the tire, so that the signal element is able to move within the tread of the tire at least as long as it is not in contact with the street and generates a structure-borne sound signal by its movement within the tread of the tire whereby in the vehicle a sensor for a structure-borne sound signal is provided for receiving the signal emitted by the signal generators; anda signal processing unit for processing the received signals into information useful for the driver.2. The vehicle according to claim 1 , wherein the signal element claim 1 , which is arranged in the tread of the tire claim 1 , has a same cross section in a running direction of the tire.3. The vehicle according to claim 1 , wherein the signal element claim 1 , which is arranged in the tread of the tire claim 1 , has a width in a cross section that is smaller than the width of the tire.4. The vehicle according to wherein the signal element has protrusions.5. ...

SYSTEM FOR SENSING AND ANALYZING PRESSURE WAVES

Appliances, methods, and systems (e.g., utilities) for use in analyzing received pressure waves to obtain and deduce various types of meaningful information therefrom (e.g., testing operation of an acoustic device that generates beams of acoustic energy). A pressure sensor in the disclosed system makes use of a piezoelectric layer or film (e.g., polyvinylidene fluoride (PVDF)) that has been substantially uniformly poled prior to interconnection with electrodes that are configured to send electrical signals to a controller or the like for generation of a dynamic, image (e.g., 2D) representing the received pressure waves. Among other advantages, the disclosed system leverages excellent economy of scale, can be configured in different arrangements with reduced cost, and limits the need for adapters or reverse engineering (e.g., as it can operate independently of the design of a probe or system under test. 1. A system for analyzing pressure waves , the system comprising: a first printed circuit board (PCB) that includes a plurality of rows of electrodes surrounded by ground for isolation;', 'a second PCB that includes a plurality of columns of electrodes surrounded by ground for isolation;', 'a piezoelectric layer disposed between the first and second PCBs, wherein each electrode of each row of electrodes of the first PCB is aligned with an electrode of a different one of the plurality of columns of electrodes of the second PCB, and wherein each respective pair of aligned electrodes is a respective individually-addressable sensor; and, 'a pressure sensor for generating electrical signals in response to impinging receipt of pressure waves, wherein the imaging array includesa controller electrically coupled with the individually-addressable sensors of the pressure sensor and having instructions to generate an image on a display based on the generated electrical signals received from the pressure sensor.2. The system of claim 1 , wherein the first PCB includes opposite ...

WEATHER DETECTION AND INTENSITY EVALUATION

Embodiments disclosed herein may relate to weather sensors and particularly to methods and systems related to collecting weather data and other site-specific data. The system may also be used to collect data on hydrometeors, especially hail. Some, but not all of the things a system described can determine are the kinetic energy, diameter, mass, and velocity. 1. A weather information capturing and processing system , comprising:a plate comprising an upper surface and a lower surface, configured to vibrate when a hydrometeor impacts the upper surface;one or more sensors, directly coupled to the plate, configured to translate the vibrations into electrical wave data, wherein the one or more sensors are coupled adjacent the lower surface of the plate;an analog-to-digital converter, communicatively coupled to the one or more sensors, configured to receive and convert the electrical wave data to digital vibration data; receive the digital vibration data;', 'analyze the digital vibration data, at least in part by interpolating attributes of the digital vibration data to a lookup table accessible by the central processing unit, to create interpolated digital vibration data;', 'create composite data from the interpolated digital vibration data;', 'send the composite data to non-volatile flash memory to be stored; and', 'transfer the composite data to one or more centralized servers via one or more networks for further analysis,, 'a central processing unit, communicatively coupled to the analog-to-digital converter, configured to'}wherein the composite data comprises one or more of kinetic energy, diameter, velocity, mass of the impacting hydrometeors, or density of the impacting hydrometeors.2. The system of claim 1 , wherein at least one of the one or more sensors is coupled adjacent to the center of the lower surface of the plate.3. The system of claim 1 , wherein at least one of the one or more sensors is coupled adjacent to a corner of the lower surface of the plate.4. ...

ULTRASONIC SENSOR

An ultrasonic sensor, which is installed on a test device, includes a shell, one end is open, the other end is closed surface; a cover sheet, bonded to the open end of the shell; a copper foil, a lower surface of the copper foil is bonded to an inner bottom surface of the closed surface of the shell; a piezoelectric chip, a lower surface of the piezoelectric chip is bonded to a upper surface of the copper foil, and when the test device vibrates, the piezoelectric chip converts a vibration signal into a voltage response signal; a cable, a positive electrode is welded on a upper surface of the piezoelectric chip, and a negative electrode is welded on the upper surface of the copper foil, configured to connect to an external detection device and transmit the voltage response signal to the external detection device.

INTEGRATED ACOUSTIC EMISSION TRANSDUCER APPARATUS AND METHODS

Integrated acoustic emission transducer apparatus and methods are described. An example apparatus includes an acoustic emission sensor having a data extractor and a process variable determiner integrated within the acoustic emission sensor. The acoustic emission sensor is to generate an acoustic emission signal. The data extractor is to extract signal data from the acoustic emission signal. The process variable determiner is to determine process variable data based on the extracted signal data. The process variable data includes at least one of leakage rate data, flow rate data, flow capacity data, flow area data, flow velocity data, mass accumulation data, or volume accumulation data. 1. An apparatus , comprising:an acoustic emission sensor including a data extractor and a process variable determiner, the acoustic emission sensor to generate an acoustic emission signal, the data extractor to extract signal data from the acoustic emission signal, the process variable determiner to determine process variable data based on the extracted signal data, the process variable data including at least one of leakage rate data, flow rate data, flow capacity data, flow area data, flow velocity data, mass accumulation data, or volume accumulation data.2. The apparatus of claim 1 , wherein the extracted signal data includes at least one of root mean square data associated with the acoustic emission signal claim 1 , average signal level data associated with the acoustic emission signal claim 1 , spectral content data associated with the acoustic emission signal claim 1 , or transient data associated with the acoustic emission signal.3. The apparatus of claim 1 , wherein the acoustic emission sensor further includes a status indication determiner to determine status indication data based on the process variable data.4. The apparatus of claim 3 , wherein the status indication data includes at least one of valve health data claim 3 , valve wear data claim 3 , seal health data claim 3 ...

VIBRATION WAVEFORM SENSOR AND WAVEFORM ANALYSIS DEVICE

In an embodiment, a sensor module includes a piezoelectric element placed on the principal face of a board , which piezoelectric element is surrounded by a vibration ring and installed in an appropriate position on a person's arm, neck, etc., using a medical fixing tape, etc., with the vibration ring contacting the person's skin. When a pulse wave is transmitted to the vibration ring from the skin, the board also vibrates and this vibration is transmitted to the piezoelectric element . Then, the piezoelectric element is displaced and the pulse wave vibration is converted to an electrical signal. The resulting electrical signal is amplified by an amplifier on the board and input to the vibration analysis device , where prescribed calculations are run to perform waveform analysis. The vascular state, etc., can be known from pulse waveforms. 1. A vibration waveform sensor , comprising:a circuit board;a piezoelectric element provided on the circuit board, that continuously receives vibrations of the circuit board and obtains vibration waveforms; anda vibration-conveying body that contacts a target and transmits vibrations of the target to the circuit board.2. A vibration waveform sensor , comprising:a circuit board that transmits vibrations;a piezoelectric element installed on the circuit board, that converts vibrations transmitted from the circuit board to electrical signals and outputs them as waveform signals to obtain vibration waveforms; anda vibration-conveying body that contacts a target, introduces vibrations of the target, and transmits them to the circuit board.3. The vibration waveform sensor according to claim 1 , wherein the vibration-conveying body is conductive.4. The vibration waveform sensor according to claim 1 , wherein a signal amplifier for amplifying signals of the vibration waveforms output from the piezoelectric element claim 1 , is provided on the circuit board.5. The vibration waveform sensor according to claim 1 , wherein the vibration- ...

PIEZOELECTRIC VIBRATION SENSOR FOR MONITORING MACHINERY

A vibration sensor includes a piezoelectric crystal; and a base having an upper surface and a lower surface, the piezoelectric crystal attached to the upper surface of the base, the base defining a notch in at least one of the upper surface and the lower surface. Another embodiment of a vibration sensor includes a first piezoelectric crystal; a second piezoelectric crystal; a base attached to the first piezoelectric crystal on first side of the base and attached to the second piezoelectric crystal on a second side of the base opposite the first side of the base; a voltage amplifier in electrical communication to the first piezoelectric crystal; and a charge amplifier in electrical communication to the second piezoelectric crystal. 1. A vibration sensor comprising:a piezoelectric crystal; anda base having an upper surface and a lower surface, the piezoelectric crystal attached to the upper surface of the base, the base defining a notch in at least one of the upper surface and the lower surface.2. The vibration sensor of claim 1 , wherein the notch is a cut extending from the upper surface to the lower surface.3. The vibration sensor of claim 1 , further comprisinga fastener extending through a hole defined in the piezoelectric crystal and a hole defined the base; anda spacer, the fastener attaching the piezoelectric crystal and the base to the spacer;wherein the piezoelectric crystal is attached to the base by conductive adhesive.4. The vibration sensor of claim 1 , wherein the notch extends inward from an outer edge of the base.5. The vibration sensor of claim 1 , wherein the base is disc-shaped and the notch extends in a radial direction relative to an axis of the base.6. The vibration sensor of claim 1 , wherein the notch is defined on the base inward from an outermost edge of the piezoelectric crystal when the piezoelectric crystal is attached to the base.7. The vibration sensor of claim 1 , wherein the notch is a first notch and the base includes a second notch ...

PIEZOELECTRIC VIBRATION SENSOR FOR FLUID LEAK DETECTION

A vibration sensor includes at least one piezoelectric crystal having an upper surface and a lower surface; a base having an attachment section defining an attachment surface and an at least one calibration mass; wherein a one of the at least one piezoelectric crystal upper surface and lower surface attaches to the attachment surface of the base; and wherein the at least one calibration mass is external to the piezoelectric crystal. 1. A sensor comprising:at least one piezoelectric crystal having an upper surface and a lower surface;a base having an attachment section defining an attachment surface and an at least one calibration mass;wherein a one of the at least one piezoelectric crystal upper surface and lower surface attaches to the attachment surface of the base; andwherein the at least one calibration mass is external to the piezoelectric crystal.2. The sensor of claim 1 , wherein the base includes a first calibration mass and a second calibration mass claim 1 , wherein the first calibration mass has a calibration mass thickness greater than a thickness of the attachment section of the base and the second calibration mass has a calibration mass thickness greater than the thickness the attachment section of the base.3. The sensor of claim 2 , wherein the base defines a notch between the first calibration mass and the second calibration mass.4. The sensor of claim 2 , wherein the second calibration mass thickness is equal to the first calibration mass thickness.5. The sensor of claim 2 , wherein the base includes at least three calibration masses claim 2 , each of the at least three calibration masses having a calibration mass thickness greater than a combined thickness of the at least one piezoelectric crystal and the attachment section.6. The sensor of claim 1 , wherein the at least one calibration mass is wedge-shaped and defines a rectangular cross-section.7. The sensor of claim 1 , wherein the lower surface of the piezoelectric crystal is attached to the ...

DETECTION DEVICE, PERCUSSION INSTRUMENT, AND DETECTION METHOD

The disclosure provides a detection device, a percussion instrument, and a detection method. The percussion instrument includes a head; a base that has at least a portion formed in a curved shape and that is in contact with the head in a direction in which a curvature of the curved shape is changed with a vibration of the head; and a film-shaped piezoelectric sensor disposed on the base. 19-. (canceled)10. A percussion instrument comprising:a head;a base that has at least a portion formed in a curved shape and that is in contact with the head in a direction in which a curvature of the curved shape is changed with a vibration of the head; anda film-shaped piezoelectric sensor disposed on the base.11. The percussion instrument according to claim 10 , wherein the base is pressed against the head and is elastically deformed.12. The percussion instrument according to claim 10 , further comprising:a holding part for holding the base,wherein the base is formed in an annular shape.13. The percussion instrument according to claim 12 , wherein a first part of the base held by the holding part and a second part of the base in contact with the head face each other in a vibration direction of the head.14. The percussion instrument according to claim 12 , wherein the holding part is detachably attached to the head.15. The percussion instrument according to claim 10 , wherein the base is formed of a polyethylene terephthalate film.16. The percussion instrument according to claim 10 , wherein the piezoelectric sensor is disposed on a portion of an outer peripheral surface of the base in a circumferential direction.17. The percussion instrument according to claim 16 , wherein an upper end and a lower end of the piezoelectric sensor are disposed at a predetermined distance in an up-down direction from a lower end of the base claim 16 , and the predetermined distance is set in a range of 1/20 to ⅕ of an outer diameter dimension of the base.18. The percussion instrument according to ...

CAPACTIVE BASED MECHANOMYOGRAPHY

A sensor system for determining activity of muscles. A plurality of receiving antennas are located on a wearable located proximate to a user skin's surface. A transmitting antenna is located at a location proximate to a user's skin. The transmitting antenna transmits infuses a signal to a user. Measurements of the infused signal are performed on the signals received by the receiving antennas. The measurements of the infused signal are processed and activity of the muscles of the user is determined based on the processed measurements. 1. A sensing system for determining muscle activity , comprising:a transmitting antenna adapted to transmit at least one signal into a user of the sensing system;a plurality of receiving antennas, each one of the plurality of receiving antennas adapted to receive the at least one signal transmitted into the user; anda processor adapted to process measurements for each one of the plurality of receiving antennas of the at least one signal transmitted into the user received by each one of the plurality of receiving antennas and determine muscle activity based on the processed measurements.2. The sensing system of claim 1 , wherein the muscle activity determined is opposition of a user's fingers.3. The sensing system of claim 1 , wherein the muscle activity determined is touching of an object.4. The sensing system of claim 1 , wherein the muscle activity determined is whether or not fingers have touched or pinched.5. The sensing system of claim 1 , wherein the muscle activity is used to create a mechanomyogram.6. The sensing system of claim 5 , wherein the mechanomyogram is used to determine oscillation and vibration of muscles.7. The sensing system of claim 1 , wherein the transmitting antenna is adapted to be located on a person's body.8. A sensing system for determining muscle activity claim 1 , comprising:a transmitting antenna adapted to transmit signals into a user of the sensing system;a plurality of receiving antennas, each one of ...

Method of operating electro-acoustic transducers, and corresponding circuit and device

An electro-acoustical transducer such as a Piezoelectric Micromachined Ultrasonic Transducers is coupled with an adjustable load circuit having a set of adjustable load parameters including resistance and inductance parameters. Starting from at least one resonance frequency or at least one ring-down parameter of the electro-acoustical transducer a set of model parameters is calculated for a Butterworth-Van Dyke (BVD) model of the electro-acoustical transducer. The BVD model includes an equivalent circuit network having a constant capacitance coupled to a RLC branch and the adjustable load circuit is coupled with the electro-acoustical transducer at an input port of the equivalent circuit network of the model of the electro-acoustical transducer. The adjustable load parameters are adjusted as a function of the set of model parameters calculated for the BVD model of the electro-acoustic transducer to increase the bandwidth or the sensitivity of the electro-acoustic transducer.

Piezoelectric vibration sensor

A piezoelectric vibration sensor includes a piezoelectric element which is in a form of flat plate, an element holding plate which is in a form of flat plate, and first and second support members. An electrode is arranged on at least one plane of the piezoelectric element. The piezoelectric element is joined to one plane of the piezoelectric element. The first support member and the second support member support the piezoelectric element and the element holding plate. A vibration film activates vibration of the element holding plate between the first support member and the second support member. Moreover, the element holding plate is joined to each of the first support member and the second support member through the vibration film. As a result, it is possible to obtain high sensitivity in a wide frequency range and to withstand an impact which is added from the outside.

Auscultatory sound-or-vibration sensor

A metallic diaphragm disk incorporating a piezoelectric material bonded thereto and operatively coupled to a base rim of a housing provides for closing an open-ended cavity at the first end of the housing. In one aspect, plastic film adhesively bonded to at least one of an outer rim of the housing or an outer-facing surface of the disk provides for receiving an adhesive acoustic interface material to provide for coupling the housing to the skin of a test subject. In another aspect, an outer-facing surface of a base portion of the housing provides for receiving an adhesive acoustic interface material to provide for coupling the housing to the skin of a test subject, at least one inertial mass is operatively coupled to a central portion of the metallic diaphragm disk, and the opening in the first end of the housing is closed with a cover.

Systems and methods for capturing and interpreting audio

A device is provided as part of a system, the device being for capturing vibrations produced by an object such as a musical instrument. Via a fixation element, the device is fixed to a drum. The device has a sensor spaced apart from a surface of the drum, located relative to the drum, and a magnet adjacent the sensor. The fixation element transmits vibrations from its fixation point on the drum to the magnet. Vibrations from the surface of the drum and from the magnet are transmitted to the sensor. A method may further be provided for interpreting an audio input, such as the output of the sensors within the system, the method comprising identifying an audio event or grouping of audio events within audio data, generating a model of the audio event that includes a representation of a timbre characteristic, and comparing that representation to expected representations.

SLIDING RANGE GATE FOR LARGE AREA ULTRASONIC SENSOR

An apparatus includes an ultrasonic sensor array and a sensor controller. The sensor array includes a plurality of ultrasonic sensor pixels, each sensor pixel including an ultrasonic receiver and a receiver bias electrode and being operable in one or both of a transmit mode of operation or a read mode of operation. The sensor controller is electrically coupled with the receiver bias electrodes. The sensor controller is configured to set, at each sensor pixel, a range gate window (RGW) by modulating a bias voltage applied to the receiver bias electrode and to set, for a first portion of the ultrasonic sensor pixels, a first RGW. The sensor controller is configured to set, for a second portion of the ultrasonic sensor pixels, a second RGW, and establish a first temporal delay between the first RGW and the second RGW. 1. An apparatus comprising:an ultrasonic sensor array including a plurality of ultrasonic sensor pixels, each sensor pixel including an ultrasonic receiver and a receiver bias electrode and being operable in one or both of a transmit mode of operation or a read mode of operation; anda sensor controller electrically coupled with the receiver bias electrodes; the sensor controller is configured to set, at each sensor pixel, a range gate window (RGW) by modulating a bias voltage applied to the receiver bias electrode;', 'the sensor controller is configured to set, for a first portion of the ultrasonic sensor pixels, a first RGW; and', 'the sensor controller is configured to set, for a second portion of the ultrasonic sensor pixels, a second RGW, and establish a first temporal delay between the first RGW and the second RGW., 'wherein'}2. The apparatus of claim 1 , wherein the apparatus is configured to establish a temporal phasing of acoustic signals returned claim 1 , as a result of interaction with a target object claim 1 , to the ultrasonic sensor array such that the first portion of the ultrasonic sensor pixels receives the returned acoustic signals at a ...

Layer for inducing varying delays in ultrasonic signals propagating in ultrasonic sensor

An apparatus includes an ultrasonic transmitter, an ultrasonic receiver, and an acoustic delay gradient layer disposed in an acoustic path between the ultrasonic transmitter and the ultrasonic receiver. The acoustic delay gradient layer is configured to cause a reflection from a platen interface of the transmitted ultrasonic signal to reach the first receiver region at a first time and the reflection from the platen interface of the transmitted ultrasonic signal to reach the second receiver region at a second time that is different from the first time. The apparatus can further include a controller configured to set for a first region or portion of the receiver, a first range gate window (RGW). The controller is also configured to set, for a second region or portion of the receiver, a second RGW, and to establish a first temporal delay between the first RGW and the second RGW.

INTEGRATED PIEZOELECTRIC MICROELECTROMECHANICAL ULTRASOUND TRANSDUCER (PMUT) ON INTEGRATED CIRCUIT (IC) FOR FINGERPRINT SENSING

Microelectromechanical (MEMS) devices and associated methods are disclosed. Piezoelectric MEMS transducers (PMUTs) suitable for integration with complementary metal oxide semiconductor (CMOS) integrated circuit (IC), as well as PMUT arrays having high fill factor for fingerprint sensing, are described. 1. A method , comprising:forming a plurality of cavities in a complementary metal oxide semiconductor (CMOS) device wafer;depositing and patterning a piezoelectric layer over the plurality of cavities;forming a plurality of openings in the piezoelectric layer to expose a first conductive material layer under the piezoelectric layer and to expose at least one CMOS device wafer electrode; anddepositing and patterning a second conductive material layer over the piezoelectric layer to establish an electrical connection between the at least one CMOS device wafer electrode and the second conductive material layer.2. The method of claim 1 , wherein the forming the plurality of cavities comprises forming a piezoelectric MUT (PMUT) array of a fingerprint sensor adapted to sense a characteristic of a fingerprint placed adjacent to the PMUT array and opposite the plurality of cavities.3. The method of claim 1 , wherein the forming a plurality of cavities further comprises:filling the plurality of cavities in the CMOS device wafer with sacrificial material;planarizing the sacrificial material on the CMOS device wafer;depositing a capping layer over the sacrificial material;forming at least one opening in the capping layer to expose the sacrificial material;selectively removing the sacrificial material; andsealing the at least one opening in the capping layer.4. The method of claim 3 , further comprising:depositing the first conductive material layer comprising a metal conductive layer over the capping layer.5. The method of claim 1 , wherein the depositing and patterning the piezoelectric layer comprises depositing and patterning at least one of aluminum nitride claim 1 , lead ...

SYSTEM FOR DETECTING EVENTS OR SITUATIONS HAVING ASSOCIATED PATTERNS OF ACOUSTIC VIBRATIONS IN A TRAIN RAIL AND VIBRATION DETECTOR UNIT FOR THIS SYSTEM

System () for detecting events or situations having associated patterns of acoustic vibrations in a train rail (), which comprises a vibration detector unit () provided with an acoustic sensor () and attached to the rail () that can sense the acoustic vibrations transmitted through the rail () and a main assembly () connected to the vibration detector unit (), wherein the vibration detector unit () comprises a processor () and the main assembly () comprises a control unit (), the processor () comprising stored patterns corresponding to known events, the processor () being configured to preprocess the vibrations transmitted to the rail (), to determine if the vibrations correspond to a stored pattern and, if the vibrations correspond to a stored pattern, send to the control unit () a signal associated to the event. The invention also refers to the vibration detector unit () itself. 112322433313324413232241. System () for detecting events or situations having associated patterns of acoustic vibrations in a train rail () , which comprises at least a vibration detector unit () destined to be attached to the rail () such that it can sense the acoustic vibrations transmitted through the rail () and a main assembly () connected to the vibration detector unit () , the vibration detector unit () comprising an acoustic sensor () , characterised in that the vibration detector unit () comprises a processor () and the main assembly () comprises a control unit () , the processor () comprising stored patterns corresponding to known events , the processor () being configured to preprocess the vibrations transmitted to the rail () , to determine if the vibrations correspond to a stored pattern and , if the vibrations correspond to a stored pattern , send to the control unit () a signal associated to the evento.241. System according to claim 1 , wherein the processor is configured to send to the control unit () the data associated with the vibrations for further analysis if the ...

INTEGRATED PIEZOELECTRIC MICROELECTROMECHANICAL ULTRASOUND TRANSDUCER (PMUT) ON INTEGRATED CIRCUIT (IC) FOR FINGERPRINT SENSING

Microelectromechanical (MEMS) devices and associated methods are disclosed. Piezoelectric MEMS transducers (PMUTs) suitable for integration with complementary metal oxide semiconductor (CMOS) integrated circuit (IC), as well as PMUT arrays having high fill factor for fingerprint sensing, are described. 1. A microelectromechanical systems (MEMS) device , comprising:a MEMS ultrasound transducer (MUT) structure and a piezoelectric material comprising scandium disposed within the MEMS device comprising a piezoelectric MUT (PMUT) array of a fingerprint sensor adapted to sense a characteristic of a fingerprint placed adjacent to the MUT structure;a first metal conductive layer disposed on the piezoelectric material; anda plurality of metal electrodes configured to form electrical connections between the first metal conductive layer, the piezoelectric material, and a complementary metal oxide semiconductor (CMOS) structure, wherein the pMUT structure and the CMOS structure are vertically stacked.2. The MEMS device of claim 1 , further comprising:a second metal conductive layer disposed on the piezoelectric material and opposite the first metal conductive layer.3. The MEMS device of claim 1 , further comprising:a stand-off formed on the piezoelectric material.4. The MEMS device of claim 3 , wherein the stand-off comprises a silicon dioxide layer deposited over the piezoelectric material.5. The MEMS device of claim 3 , wherein the MUT structure is bonded to the CMOS structure at the standoff via at least one of a eutectic bonding layer claim 3 , a compression bond claim 3 , or a conductive epoxy.6. The MEMS device of claim 5 , wherein the eutectic bonding layer comprises an aluminum-germanium eutectic bonding layer.7. The MEMS device of claim 5 , wherein the MUT structure is electrically coupled to the CMOS structure at the standoff.8. The MEMS device of claim 1 , wherein the piezoelectric material comprises scandium doped aluminum nitride.9. The MEMS device of claim 1 , ...

MONITORING OF VEHICLE WINDOW VIBRATIONS FOR VOICE-COMMAND RECOGNITION

Method and apparatus are disclosed for monitoring of vehicle window vibrations for voice-command recognition. An example vehicle includes a window, an outer layer, a vibration sensor coupled to the window to detect audio vibrations, an audio actuator coupled to the outer layer to vibrate the outer layer, and a controller. The controller is to detect a voice command from a user via the vibration sensor, identify an audio response based upon the voice command, and emit the audio response to the user via the audio actuator. 1. A vehicle comprising:a window;an outer layer;a communication node to detect when a key fob of a user is within a communication range of the vehicle;a vibration sensor coupled to the window to detect audio vibrations;an audio actuator coupled to the outer layer to vibrate the outer layer; and activate the vibration sensor responsive to the communication node detecting the key fob is within the communication range;', 'detect a voice command from the user via the vibration sensor;', 'identify an audio response based upon the voice command; and', 'emit the audio response to the user via the audio actuator., 'a controller to2. The vehicle of claim 1 , wherein the window is a windshield.3. The vehicle of claim 1 , wherein the controller detects the voice command of and emits the audio response for the user when the user is outside of a vehicle cabin.4. The vehicle of claim 1 , wherein the vibration sensor is an accelerometer.5. The vehicle of claim 1 , wherein the audio actuator actuates the outer layer to cause the outer layer to form an acoustic baffle.6. The vehicle of claim 1 , wherein the outer layer to which the audio actuator is coupled includes a door panel.7. The vehicle of claim 1 , wherein the outer layer to which the audio actuator is coupled includes the window.8. The vehicle of claim 1 , wherein the controller triggers detection of the voice command responsive to detecting a wake-up term via the vibration sensor claim 1 , the wake-up term ...

VIBRATION DETECTION ELEMENT AND METHOD FOR MANUFACTURING THE SAME

A vibration detection element () includes substrates ( to ), a support member (), a support member (), and an oscillator (). The substrates ( to ) have a space portion (SP) having a bottom surface (A) and a bottom surface (A) opposed to the bottom surface (A). The support member () protrudes from the bottom surface (A) toward the bottom surface (A) of the space portion (SP). The support member () protrudes from the bottom surface (A) toward the bottom surface (A) of the space portion. The oscillator () is disposed in contact with the support member () or the support member () and capable of vibrating in the space portion (SP) and has a thickness less than 10 μm. The support members () each include multiple supports which prevent the oscillator () from contacting the bottom surface (A) or the bottom surface (A). 1. A method for manufacturing a vibration detection element , comprising:a first step including joining a first substrate having an oscillator adhered with a heat-resistant adhesive to a first support member protruding from a bottom surface of a first recess of the first substrate and a second substrate having a second support member protruding from a bottom surface of a second recess of the second substrate so that the oscillator is opposed to the second support member; anda second step removing the heat-resistant adhesive after the first step.2. The method for manufacturing a vibration detection element according to claim 1 , wherein the first step comprises:a first sub step producing the first substrate having the oscillator adhered to the first support member with the heat-resistant adhesive using a third substrate to which the oscillator is adhered; anda second sub step joining the first substrate and the second substrate after the first sub step so that the oscillator is opposed to the second support member.3. The method for manufacturing a vibration detection element according to claim 2 , wherein the first sub step comprises:a sub step A forming the ...

APPARATUS AND METHOD FOR ENERGY HARVESTING ROUND COUNTER FOR FIREARMS

An energy harvesting device for accurately counting rounds fired by a firearm comprises a piezoelectric element for mechanical coupling to the barrel of the firearm. The piezoelectric element may produce a voltage waveform in response to the mechanical vibrations from a round passing through the barrel, which may power a microcontroller. The microcontroller may determine the rate of change of the voltage waveform to determine if a live round was fired. The microcontroller may be in communication with an RFID chip. The microcontroller may read the value on the RFID chip, increment the value of the RFID chip in response to being turned on by the voltage waveform, and then store the incremented value on the RFID chip. An armorer may remotely check the value of the RFID chip. 1. A system for determining the number of rounds fired by a firearm , the system comprising:a piezo electric sensor for mechanical connection to the firearm, the piezo electric sensor configured to detect mechanical vibrations and output one or more voltage waveforms representing the mechanical vibrations, wherein the piezo electric sensor comprises piezo material having a high mechanical quality factor;a radio frequency identification chip;a non-volatile memory;a microcontroller in communication with the piezo electric sensor and the radio frequency identification chip, and wherein the microcontroller is programmed to receive the one or more voltage waveforms;a bridge rectifier in communication with the piezo electric sensor;a capacitor in electrical communication with the bridge rectifier and the piezo electric sensor; anda means for regulating voltage in electrical communication to the capacitor and the microcontroller;wherein the radio frequency identification chip is in electrical communication with the means for regulating voltage, and wherein the microcontroller is programmed to, when the microcontroller receives the one or more voltage waveforms, receive a stored value from the non-volatile ...

HIGH TEMPERATURE SENSORS AND TRANSDUCERS

A high temperature piezoelectric sensor device such as a high temperature accelerometer, force sensor, pressure sensor, temperature sensor, acoustic sensor and/or acoustic transducer for use at temperatures up to 1000° C. The high temperature device includes a base, a piezoelectric element attached to the base and a pair of electrodes in electrical communication with the piezoelectric element. The piezoelectric element can have a dpiezoelectric coefficient between 16.0-18.0 pC/N for all temperatures between 25 to 700° C., and a rotated dpiezoelectric coefficient of 8.0-9.5 pC/N with zero face shear/thickness shear piezoelectric coefficients d. dand din the same temperature range. The piezoelectric element can also have an electromechanical coupling factor kvariation of less than 7%, and dand rotated dpiezoelectric coefficient variations of less than 5% for temperatures between 25 to 700° C. The piezoelectric element can have high electrical resistivity, being on the order of >10Ω·cm at 600° C. The piezoelectric element can be an ABCOpiezoelectric material with a Fresnoite structure and A=Ca, Sr, Ba, Mg; B═Ti, Zr, Hf, V; and C═Si, Ge, Sn. 1. A high temperature piezoelectric sensor device for use at temperatures up to 1000° C. comprising:a base;a piezoelectric element attached to said base;a pair of electrodes in electrical communication with said piezoelectric element;{'sub': '33', 'said piezoelectric element comprising a rotated dpiezoelectric coefficient between 8.0-9.5 pC/N for all temperatures between 25 to 700° C.'}2. The high temperature piezoelectric sensor device of claim 1 , wherein said piezoelectric element comprises a rotated dpiezoelectric coefficient variation less than 5% for temperatures between 25 to 700° C.3. The high temperature piezoelectric sensor device of claim 1 , wherein said piezoelectric element is a single crystal with a chemical stoichiometry of (SrBa)(TiZr)(SiGe)O claim 1 , where x is in the range of 0≤x≤1 claim 1 , y is in the range of ...

SYSTEM AND METHOD FOR SENSING VIBRATIONS IN EQUIPMENT

This invention provides a low-profile, highly-sensitive, high-frequency sensor that can be affixed to equipment. Low-profile electronics with the ability to capture and analyze specific signals of concern can be utilized as to remain unobtrusive. Vibration data can be captured and stored locally on the equipment where user-defined code can analyze data and pick specific parameters of concern to send via the wireless communications link to a receiver. The receiver is able to capture the data and monitor parameters of the equipment. 1. A system for measuring and reporting vibrations comprising:at least one sensor;at least one transmitting antenna;a central processing unit;a battery; anda package, the package encapsulating the system, wherein the overall thickness of the package is approximately 2 mm or less.2. The system of further comprising an inductive wireless charging coil.3. The system of wherein the at least one sensor includes a dynamic strain sensor.4. The system of wherein the dynamic strain sensor is a piezo ceramic.5. The system of wherein the dynamic strain sensor is a piezo polymer.6. The system of wherein the at least one sensor includes an inertial sensor.7. The system of wherein the at least one sensor includes a strain sensor.8. The system of where the area mass density of the system is approximately 3.5 kg/mor less.9. The system of wherein the system can be adhered to a structure with an adhesive with a peel strength of approximately 550 Pa or more and adhesive strength of approximately 2.2 kPa or more.10. The system of wherein the adhesive is a double sided tape11. The system of wherein the package is constructed with flexible polymer materials such that the system can conform to engineering surfaces.12. The system of wherein the system can conform to a radius of approximately ¾″ or less.13. The system of wherein the outer encapsulation allows for the addition of printed logo and branding.14. The system of wherein the branding or logo allows for ...

SYSTEMS AND METHODS FOR CAPTURING AND INTERPRETING AUDIO

A device is provided for capturing vibrations produced by an object such as a musical instrument such as a cymbal of a drum kit. The device comprises a detectable element, such as a ferromagnetic element, such as a metal shim and a sensor spaced apart from and located relative to the musical instrument. The detectable element is located between the sensor and the musical instrument. When the musical instrument vibrates, the sensor remains stationary and the detectable element is vibrated relative to the sensor by the musical instrument. 1. A device for capturing vibrations produced by an object , the device comprising:a detectable element located relative to the object;a sensor spaced apart from the object and located relative to the object;wherein the detectable element is located between the sensor and the object, and wherein when the object vibrates, the sensor remains stationary and the detectable element is vibrated relative to the sensor by the object.2. The device of wherein the object is a musical instrument.3. The device of wherein the object is a cymbal claim 2 , and wherein the device is a cymbal clamp.4. The device of wherein the detectable element is a ferromagnetic shim claim 3 , and wherein the sensor is an inductive coil claim 3 , and wherein the device further comprises a magnet fixed adjacent the inductive coil such that the inductive coil and the magnet remain stationary when the object vibrates.5. The device of wherein the ferromagnetic shim is spaced apart from the cymbal by a first pad or portion of a pad claim 4 , and wherein the ferromagnetic shim is spaced apart from the sensor by a second pad or portion of a pad claim 4 , such that the vibration of the ferromagnetic shim is proportional to the vibration of the cymbal.6. The device of claim 5 , wherein the first pad or portion of a pad and the second pad or portion of a pad comprise felt and the ferromagnetic shim is a metal shim.7. A cymbal clamp comprising:a cymbal clamping location ...

Method And Apparatus For Detection Of Broken Piezo Material Of An Ultrasonic Transducer Of An Ultrasonic Stack

A broken piezoelectric material in an ultrasonic transducer of an ultrasonic stack of an ultrasonic device is detected by measuring a test piezo coupling constant with a test scan of the ultrasonic stack. The test piezo coupling constant is compared to a previously measured baseline piezo coupling constant. The piezoelectric material is determined to be broken when the test piezo coupling constant is less than the baseline piezo coupling constant by more than a predetermined amount. 1. A method of detecting broken piezoelectric material in an ultrasonic transducer of an ultrasonic stack of an ultrasonic device , comprising:performing with a power supply of the ultrasonic device a test scan of the ultrasonic stack in air, measuring a test piezo coupling constant with the test scan of the ultrasonic stack, comparing the test piezo coupling constant with a previously measured baseline piezo coupling constant and determining that the piezoelectric material is broken when the test piezo coupling constant is less than the baseline piezo coupling constant by more than a predetermined amount.2. The method of including establishing the baseline piezo coupling constant by performing with the power supply of the ultrasonic device a baseline scan of the ultrasonic stack in air when the piezoelectric material of the ultrasonic transducer is known to be good and measuring the baseline piezo coupling constant with the baseline scan of the ultrasonic stack.3. The method of including storing the baseline piezo coupling constant in memory of a controller as the baseline piezo coupling constant and having the controller compare the test piezo coupling constant to the baseline piezo coupling constant and determine that the piezoelectric material is broken when the test piezo coupling constant is less than the baseline piezo coupling constant by more than the predetermined amount.4. The method of including having the controller provide an alert upon determining that the piezoelectric ...

ULTRASONIC PROXIMITY SENSORS, AND RELATED SYSTEMS AND METHODS

An ultrasonic proximity sensor can determine one or more characteristics of a local environment. For example, the sensor can emit an ultrasonic signal into a local environment and can receive an ultrasonic signal from the local environment. From a measure of correlation between the emitted and the received signals, the sensor can classify the local environment. By way of example, such a sensor can assess whether an in-ear earphone is positioned in a user's ear. A media device in communication with the sensor can transmit an audio signal to the earphone for audio playback responsive to a determination by the sensor that the earphone is in the user's ear and can redirect the audio signal to another playback device responsive to a determination by the sensor that the earphone is not in the user's ear. Related and other aspects also are described. 1. An electronic device , comprising:a housing having an internal surface and an external surface; and emit a plurality of ultrasonic signals through at least a portion of the housing from the plurality of ultrasonic transducers,', 'detect a plurality of reflections of at least some of the emitted plurality of ultrasonic signals, and', 'determine a contact on the external surface based on the detected plurality of reflections., 'a plurality of ultrasonic transducers spaced apart along the internal surface of the housing, wherein the sensor is configured to, 'a sensor, comprising2. The electronic device of claim 1 , wherein the ultrasonic signals from each of the plurality of ultrasonic transducers define a corresponding sensitive region of the housing.3. The electronic device of claim 1 , wherein each ultrasonic transducer is configured to generate an electrical signal responsive to one or more of the plurality of reflections of the at least some of the emitted plurality of ultrasonic signals.4. The electronic device of claim 3 , wherein the sensor further comprises a processing unit configured to determine the contact on the ...

Radio Frequency Accelerometer

Disclosure of a novel accelerometer sensor method for detecting and measuring acceleration using radio frequency (RF) oscillators. Quartz crystal oscillators (QCO) and surface acoustic wave (SAW) oscillators are known to be sensitive to acceleration or force impact events. These events cause fluctuations in the quartz crystal oscillator base natural resonant frequency. The crystalline structure of quartz crystal has a preferred direction of maximum sensitivity to acceleration. Acceleration or sudden force impact events cause fluctuations in the resonant frequency of quartz crystal and surface acoustic wave oscillators, increasing jitter and phase noise. There exists a mathematical relationship which relates these fluctuations in the natural frequency to the magnitude and direction of the accelerating source. This acceleration sensitivity can therefore be utilized to track changes in the oscillator resonant frequency referred to as jitter or phase noise to determine the magnitude of acceleration over time. 1. A Radio Frequency (RF) accelerometer sensor method utilizing the susceptibility of quartz crystal oscillators (QCO) and surface acoustic wave (SAW) oscillators to acceleration , for the purpose of sensing and measuring acceleration. The natural resonant frequencies of quartz crystal oscillators are subject to fluctuations according to an empirical mathematical relationship. In said mathematical relationship , the maximum acceleration sensitivity vector and the vector of the accelerating source , when multiplied as a vector dot product , renders the magnitude of the frequency variation of the QCO or SAW oscillator.2. Said method in uses QCO's which individually are configured to have the highest g sensitivity values possible.3. Said method in requires utilizing quartz crystal (or SAW) oscillators that operate at the highest resonant radio frequencies possible to enhance resolution.4. To enhance the resolution or sensitivity to acceleration events of said method ...

Sensing arrangement for a closed container and method for transmitting data through the container wall

A sensing arrangement for sensing a physical parameter inside a closed container transmits data through the container wall to the outside of the container. The sensing arrangement includes an inside circuit inside the container and further includes an outside circuit outside the container. The inside circuit includes a transmitter circuit configured to create a controller output signal that characterizes information to be transmitted, such as sensor information. A first inside piezoelectric transducer of the transmitter circuit creates an acoustic data signal based on the controller output signal and transmits the acoustic data signal through the wall of the container to a first outside piezoelectric transducer of the controller outside circuit. The controller output signal and/or the data signal do not contain sensor information in the amplitude or phase or frequency of the controller output signal and/or the data signal. The controller output signal is preferably pulse width modulated.

Vibration sensor with integrated temperature detection

A vibration sensor with a diaphragm that can be set into vibration, a piezo-electric drive for setting the diaphragm into vibration and for detecting vibrations in the diaphragm, with the drive having at least two serial mechanical piezo elements, a temperature sensor, with at least a first piezo element made from a first piezo-electric material and at least a second piezo element made from a second piezo-electric material. 1. A vibration sensor with an integrated temperature detectiona diaphragm that can be set into vibration,a piezo-electric drive for setting the diaphragm into vibration and for detecting vibrations of the diaphragm, with the drive comprising at least two serial mechanical piezo elements,whereinat least a first piezo element is formed from a first piezo-electric material and at least a second piezo element from a second piezo-electric material, and a temperature is determined by detecting a capacity of at least one piezo element.2. The vibration sensor according to claim 1 , further comprising wherein a first relative dielectric constant of the first piezo-electric material and a second relative dielectric constant of the second piezo-electric material show a different temperature dependency.3. The vibration sensor according to claim 1 , further comprising wherein a first coupling factor has different temperature dependencies in the direction of the material polarization of the first piezo-electric material and a second coupling factor in the direction of the material polarization of the second piezo-electric material.41. The vibration sensor () according to claim 1 , wherein the first coupling factor has an almost linear change in a temperature range from −50° C. to +200° C.5. The vibration sensor according to claim 3 , wherein the first coupling factor (k) has in the temperature range a relative change of less than +/−15%.6. The vibration sensor according to claim 4 , wherein the first coupling factor has in the temperature range values ranging ...

Ultrasonic Transducer and Ultrasonic, Flow Measuring Device

An ultrasonic transducer comprising a coupling element and a piezo element, wherein a metal disk is arranged between the coupling element and the piezo element, wherein the metal disk is connected with the piezo element or with the coupling element by means of an adhesive layer, characterized in that the adhesive layer is producible, at least in certain regions, by means of a photochemically curable adhesive.

Measuring device, measuring system, measuring method, and computer readable recording medium

To provide a measuring device wherein a measurement range corresponding to a wave shape to be measured can be set with a simple configuration. A measuring device ( 100 ) has: a measuring unit that measures changes of indexes with time, said indexes relating to an object event; a conversion unit that converts a measurement value measured by means of the measuring unit into a predetermined format within a previously set measurement range; and a control unit that controls the measurement range. The control unit changes the measurement range in the cases where a conversion value obtained by converting the measurement value by means of the conversion unit satisfies predetermined conditions in a predetermined period.

PIEZOELECTRIC ACTUATOR MODULE AND MEMS SENSOR HAVING THE SAME

Embodiments of the invention provide a piezoelectric actuator module, which includes a multilayer part comprising a multilayer piezoelectric material part and an electrode part connected to the multilayer piezoelectric material part, and a support layer coupled with the multilayer part. The piezoelectric actuator module further includes a support part displaceably supporting the support layer. The multilayer piezoelectric material part is poled in the same direction, and the multilayer part is configured to expand or contract when voltages in anti-phase are applied to the electrode part. 1. A piezoelectric actuator module , comprising:a multilayer part comprising a multilayer piezoelectric material part and an electrode part connected to the multilayer piezoelectric material part;a support layer coupled with the multilayer part; anda support part displaceably supporting the support layer,wherein the multilayer piezoelectric material part is poled in the same direction, and the multilayer part is configured to expand or contract when voltages in anti-phase are applied to the electrode part.2. The piezoelectric actuator module according to claim 1 , wherein the multilayer piezoelectric material part of the multilayer part comprises:a first piezoelectric material; anda second piezoelectric material, which the first piezoelectric material is stacked on, and is configured to expand or contract in the same direction with the first piezoelectric material, wherein the electrode part is connected to the first and second piezoelectric materials.3. The piezoelectric actuator module according to claim 1 , wherein the electrode part of the multilayer part comprises:a first electrode connected to the first piezoelectric material;a second electrode connected to the second piezoelectric material; anda third electrode disposed between the first piezoelectric material and the second piezoelectric material.4. The piezoelectric actuator module according to claim 3 , wherein with ...

VIBRATION WAVEFORM SENSOR AND PULSE WAVE DETECTION DEVICE

In an exemplary embodiment, a vibration waveform sensor includes a pair of conductive pads and a piezoelectric element whose terminal electrodes are connected thereto, which are provided on a board and these are surrounded by a conductive ring-like spacer On the interior side of the spacer a cover part substantially like a disk is provided in a manner covering over the pair of conductive pads and the piezoelectric element The cover part cuts off any humming noise from the top face of the piezoelectric element over a continuous surface, which results in a reduction of humming noise. 1. A vibration waveform sensor , characterized by comprising:a board;a pair of conductive pads formed on the board;a pair of external conductors respectively led out from the pair of conductive pads;a piezoelectric element having a piezoelectric body and a pair of terminal electrodes formed on the piezoelectric body, where the pair of terminal electrodes are respectively connected to the pair of conductive pads and mounted on the board; anda conductive spacer formed, on the board, around the piezoelectric element and the pair of conductive pads, to a height greater than a mounted height of the piezoelectric element;wherein the spacer includes a cover part, at a position lower than its rim part of the spacer on a side opposite to the board, which cover part continuously covers an upper side of the piezoelectric element and an upper side of the pair of conductive pads in their entirety as viewed from above.2. The vibration waveform sensor according to claim 1 , characterized in that the spacer has an H-shaped or M-shaped cross-section that crosses at right angles with the board.3. The vibration waveform sensor according to claim 1 , characterized in that the spacer is formed in a manner surrounding the piezoelectric element and the pair of conductive pads.4. The vibration waveform sensor according to claim 3 , characterized in that the spacer is like a frame or ring and has the cover part ...

WIRING HARNESS FOR USE WITH AUSCULTATORY SOUND-OR-VIBRATION SENSORS

Each conductor of a plurality of insulated conductors of a wiring harness extends between, and electrically connects, a corresponding terminal of a first electrical connector to either a corresponding terminal of an electrical connector jack of a plurality of electrical jacks located along the wiring harness, or to a corresponding terminal of a corresponding auscultatory sound-or-vibration sensor of the plurality of auscultatory sound-or-vibration sensors. The plurality of insulated conductors are organized in a plurality of distinct branches, each distinct branch originating either from the first electrical connector or from another portion of the wiring harness, and the locations of the plurality of distinct branches, in cooperation with the plurality of electrical jacks, if present, are implicitly suggestive of a corresponding location of the corresponding auscultatory sound-or-vibration sensor on a thorax of a test subject. 130-. (canceled)31. A wiring harness that provides for operatively coupling a plurality of auscultatory sound-or-vibration sensors to a recording module , comprising:a. a plurality of insulated conductors, andb. a first electrical connector, wherein each conductor of said plurality of insulated conductors extends between, and electrically connects, a corresponding terminal of said first electrical connector to either a corresponding terminal of an electrical connector jack of a plurality of electrical jacks located along the wiring harness, or to a corresponding terminal of a corresponding auscultatory sound-or-vibration sensor of the plurality of auscultatory sound-or-vibration sensors, wherein each said electrical connector jack of said plurality of electrical jacks, if present, provide for connecting to a corresponding electrical connector plug associated with a corresponding sound-or-vibration sensor of the plurality of auscultatory sound-or-vibration sensors;c. wherein said plurality of insulated conductors are organized in a plurality ...

HEALTH MONITORING FOR ELEVATOR AND ESCALATOR SYSTEMS

Methods and systems for health monitoring in an electrical mechanical system are provided. Aspects includes a controller coupled to a memory and one or more sensors affixed to an element of the electrical-mechanical system, wherein the one or more sensors comprise a power supply, wherein the one or more sensors are configured to collect sensor data responsive to detection of a vibration in the electrical-mechanical system above a threshold vibration, wherein the sensor data is associated with the element and transmit the sensor data to the controller, wherein the controller is configured to analyze the sensor data to determine a potential maintenance issue associated with the electrical-mechanical system. 1. A system for health monitoring of an electrical-mechanical system , the system comprising:a controller coupled to a memory; andone or more sensors affixed to an element of the electrical-mechanical system, wherein the one or more sensors comprise a power supply; collect sensor data responsive to detection of a vibration in the electrical-mechanical system above a threshold vibration, wherein the sensor data is associated with the element; and', 'transmit the sensor data to the controller, wherein the controller is configured to analyze the sensor data to determine a potential maintenance issue associated with the electrical-mechanical system., 'wherein the one or more sensors are configured to2. The system of claim 1 , wherein the controller is further configured to transmit the potential maintenance issues to a condition based maintenance system.3. The system of claim 1 , wherein the power supply comprises a battery.4. The system of claim 3 , wherein the one or more sensors operate in a low power state until the detection of the vibration in the electrical-mechanical system above the threshold vibration.5. The system of claim 1 , wherein the element of the electrical-mechanical system comprises at least one bearing.6. The system of claim 1 , wherein the ...

ONLINE DETECTION DEVICE AND METHOD FOR PIEZOELECTRIC DEVICE

An online detection device and method for a piezoelectric device. The device comprises an elastic wave sensor, a sell-detection circuit, a working circuit, a switch circuit and a control chip. The switch circuit is connected with the elastic wave sensor, the self-detection circuit and the working circuit. The sell-detection circuit is connected with the control chip and is used for, When being connected to the elastic wave sensor, generating, a self-detection signal according to the capacitance of the elastic wave sensor. The working circuit is connected with the control chip and is used for, when being connected to the elastic wave sensor, forming a touch detection circuit and detecting an external touch by means of the elastic wave sensor so as to obtain a detection signal. The control chip is connected with the switch circuit and is used for outputting a control signal to the switch circuit such that the elastic wave sensor is connected to the working circuit or the self-detection circuit The received self-detection signal is compared with a reference value to obtain a self-detection result of the elastic wave sensor according to the comparison result, or obtain, according to the received detection signal, a touch pressure generated by the external touch. 1. A piezoelectric device online detection apparatus , comprising: an elastic wave sensor , a self-check circuit , a working circuit , a switching circuit , and a control chip; the switching circuit being connected to the elastic wave sensor , the self-check circuit , and the working circuit respectively; whereinthe self-check circuit is further connected to the control chip and is configured to generate a self-check signal when connected to the elastic wave sensor;the working circuit is further connected to the control chip and is configured to form a contact detection circuit when connected to the elastic wave sensor and detect an external contact through the elastic wave sensor to obtain a detection signal; ...

PIEZOELECTRIC SENSORS AND SENSOR ARRAYS FOR THE MEASUREMENT OF WAVE PARAMETERS IN A FLUID, AND METHOD OF MANUFACTURING THEREFOR

The present disclosure relates to piezoelectric sensors and piezoelectric sensor arrays, to methods of manufacturing therefor, and to a method of measuring characteristics of a mechanical wave using a piezoelectric sensor array. A piezoelectric sensor is formed of a silicon substrate on which an electrical barrier is added. A patterned bottom electrode layer is added on top of the electrical barrier. A patterned bottom electrode layer is added on top of the electrical barrier. A piezoelectric layer and then a patterned top electrode layer are added on top of the electrical barrier. 1. A method of manufacturing a piezoelectric sensor , comprising:forming an electrical barrier on top of a silicon substrate;depositing, on top of the electrical barrier, a bottom electrode layer defining a bottom positive electrode section and a bottom negative electrode section;depositing, on top of the bottom electrode layer, a piezoelectric layer;etching, through the piezoelectric layer, a positive electrode connection area and a negative electrode connection area;depositing on top of the piezoelectric layer, a top electrode layer, the top electrode layer making contact with the bottom electrode layer through the positive and negative electrode connection areas and defining a upper positive electrode section and a upper negative electrode section;whereby a sensing area is created, in the piezoelectric layer, in an area of overlap between the upper positive electrode section and the bottom negative electrode section or between the upper negative electrode section and the bottom positive electrode section.2. The method of claim 1 , wherein the piezoelectric layer comprises a lead zirconate titanate (PZT) layer deposited using a sol-gel process.3. The method of claim 1 , wherein the electrical barrier is an oxide layer.4. The method of claim 1 , wherein the bottom electrode layer comprises a platinum sub-layer on top of a titanium sub-layer claim 1 , the titanium sub-layer forming an ...

PIEZOELECTRIC ACCELEROMETER

An acceleration change sensor includes a flexible member comprising extensions extending from a central portion. Piezoelectric capacitors are provided on respective extensions. A proof mass is coupled to the flexible member and offset from each extension of the plurality of extensions. 1. An integrated circuit (IC) , comprising:a flexible plate comprising a first pair of arms and a second pair of arms, the first pair orthogonal to the second pair;piezoelectric capacitors on each of respective arms of the first pair and on each of the arms of the second pair; anda proof mass coupled to the flexible plate and offset from the first and second pair of arms.2. The IC of claim 1 , wherein each arm of the first and second pair of arms is trapezoidal from an outside edge of the arm towards a center of the arm.3. The IC of claim 1 , wherein the arms of the first pair of arms have opposing ends and are tapered between the opposing ends.4. The IC of claim 1 , wherein the proof mass comprises silicon.5. The IC of claim 1 , wherein the arms of the first pair are parallel to each other claim 1 , and the arms of the second pair are parallel to each other.6. The IC of claim 1 , wherein the proof mass resides at least partially within a cavity of the IC claim 1 , and the IC further includes a cap on a side of the flexible plate opposite the proof mass.7. The IC of claim 1 , further comprising reference piezoelectric capacitors claim 1 , wherein the piezoelectric capacitors on the arms are subject to strain as the proof mass moves due to acceleration claim 1 , but the reference capacitors are arranged so as not to be subject to the strain.8. The IC of claim 1 , further comprising pre-amplifiers coupled to the piezoelectric capacitors claim 1 , the pre-amplifiers configured to provide a three-axis measurement of changes in acceleration.9. The IC of claim 1 , wherein the flexible plate comprises silicon dioxide.10. An acceleration change sensor claim 1 , comprising:a flexible member ...

Sensor unit and musical instrument

A sensor unit is for attaching to a vibrating body. The sensor unit includes: a sheet sensor that has a sheet shape and flexibility. The sheet sensor converts vibration that acts in a thickness direction of the sheet sensor to a voltage and outputting the voltage. The sensor unit further includes a first sticking member that includes a soft base material and two adhesive layers. The soft base material has a sheet shape and stress conformability. The two adhesive layers are respectively provided on both surfaces of the soft base material. The first sticking member is attached to one surface of the sheet sensor.

AUDIO SPECTRUM ANALYZER AND METHOD OF ARRANGING RESONATORS INCLUDED THEREIN

A spectrum analyzer includes: a support substrate; and a plurality of resonators that have center frequencies different from each other, one end of each of the plurality of resonators being fixed to the support substrate. The plurality of resonators are arranged so that an interval between resonators having adjacent center frequencies is secured by a certain value or greater, thus reducing coupling and increasing analysis accuracy. 1. A spectrum analyzer comprising:a support substrate comprising a through-hole comprising a plurality of sectors; anda plurality of resonators that have center frequencies different from each other, each of the plurality of resonators comprising a fixed portion that is fixed to the support substrate, and a movable portion that faces the through-hole,wherein, in each of the plurality of sectors, length of the plurality of resonators gradually decreases in a same direction along a circumference of the through-hole, so that a longest resonator of the plurality of resonators in a first sector is immediately adjacent to a shortest resonator of the plurality of resonators in a second sector, wherein the first sector is immediately adjacent to the second sector among the plurality of sectors of the through-hole.2. The spectrum analyzer of claim 1 , wherein the plurality of resonators are arranged in a flat formation without overlapping one another.3. The spectrum analyzer of claim 1 , wherein the fixing portions of the plurality of resonators are arranged to have a trajectory along a cross-sectional shape of the through-hole.4. The spectrum analyzer of claim 1 , wherein a cross-sectional shape of the through-hole is a circle.5. The spectrum analyzer of claim 1 , wherein a cross-sectional shape of the through-hole is a polygon with a number of sides that is equal to a number of the plurality of sectors.6. The spectrum analyzer of claim 1 , wherein a center frequency difference between two resonators spatially immediately adjacent to each other ...